Refactor rgblight_reconfig.h (#7773)

* Moved contents of rgblight_reconfig.h to rgblight_post_config.h.

In #3582, rgblight_reconfig.h had to be newly created. Now, the build system of qmk_firmware has a post_cofig feature, so that what was done in rgblight_reconfig.h can now be realized in rgblight_post_config.h.

**This commit does not change the build result.**

Testing script
```shell
  # build on master
  git checkout master
  echo master > /tmp/master_md5.txt

  # RGBLIGHT_ENABLE = no
  make HELIX=verbose helix/rev2:default:clean
  make HELIX=verbose helix/rev2:default
  md5 helix_rev2_default.hex >> /tmp/master_md5.txt

  # RGBLIGHT_ENABLE = yes, with animations
  make HELIX=verbose helix/rev2/back:default:clean
  make HELIX=verbose helix/rev2/back:default
  md5 helix_rev2_back_default.hex >> /tmp/master_md5.txt

  # RGBLIGHT_ENABLE = yes, without animations
  make HELIX=verbose,no_ani helix/rev2/back:default:clean
  make HELIX=verbose,no_ani helix/rev2/back:default
  md5 helix_rev2_back_default.hex >> /tmp/master_md5.txt

  # build on refactor_rgblight_reconfig.h
  git checkout refactor_rgblight_reconfig.h
  echo refactor_rgblight_reconfig.h > /tmp/branch_md5.txt

  # RGBLIGHT_ENABLE = no
  make HELIX=verbose helix/rev2:default:clean
  make HELIX=verbose helix/rev2:default
  md5 helix_rev2_default.hex >> /tmp/branch_md5.txt

  # RGBLIGHT_ENABLE = yes, with animations
  make HELIX=verbose helix/rev2/back:default:clean
  make HELIX=verbose helix/rev2/back:default
  md5 helix_rev2_back_default.hex >> /tmp/branch_md5.txt

  # RGBLIGHT_ENABLE = yes, without animations
  make HELIX=verbose,no_ani helix/rev2/back:default:clean
  make HELIX=verbose,no_ani helix/rev2/back:default
  md5 helix_rev2_back_default.hex >> /tmp/branch_md5.txt

  diff -u /tmp/master_md5.txt /tmp/branch_md5.txt
```

Test result:
```
--- /tmp/master_md5.txt 2020-01-03 15:42:22.000000000 +0900
+++ /tmp/branch_md5.txt 2020-01-03 15:42:42.000000000 +0900
@@ -1,4 +1,4 @@
-master
+refactor_rgblight_reconfig.h
 MD5 (helix_rev2_default.hex) = f360032edd522448366d471d8f4f8181
 MD5 (helix_rev2_back_default.hex) = 0c663acc6cccc44476b3b969ad22a48f
 MD5 (helix_rev2_back_default.hex) = e66b1195ff6d38e6e22c975b8ae42fd3
```

* Expressions that are too long are difficult to read, so wrap them.

* Edit the expression again

* remove `defined(RGBLIGHT_ANIMATIONS)` in `tmk_core/common/*/suspend.c`, `tmk_core/protocol/*/main.c`

move contents of rgblight_reconfig.h to rgblight.h.

The following changes were made to rgblight.h.

```diff
+#ifdef RGBLIGHT_USE_TIMER
 void rgblight_task(void);

 void rgblight_timer_init(void);
 void rgblight_timer_enable(void);
 void rgblight_timer_disable(void);
 void rgblight_timer_toggle(void);
+#else
+#define rgblight_task()
+#define rgblight_timer_init()
+#define rgblight_timer_enable()
+#define rgblight_timer_disable()
+#define rgblight_timer_toggle()
+#endif
```

The following changes were made to tmk_core/common/avr/suspend.c, tmk_core/common/chibios/suspend.c, tmk_core/protocol/chibios/main.c, tmk_core/protocol/lufa/lufa.c, tmk_core/protocol/vusb/main.c.

```diff
-#    ifdef RGBLIGHT_ANIMATIONS
     rgblight_timer_enable();
-#    endif
```
```diff
-#if defined(RGBLIGHT_ANIMATIONS) && defined(RGBLIGHT_ENABLE)
+#if defined(RGBLIGHT_ENABLE)
         rgblight_task();
 #endif
```

* remove 'defined(RGBLIGHT_ANIMATIONS)' in tmk_core/common/keyboard.c

Co-authored-by: Joel Challis <git@zvecr.com>

quantum/rgblight.c

@@ -211,9 +211,7 @@ void rgblight_init(void) {
 
     eeconfig_debug_rgblight();  // display current eeprom values
 
-#ifdef RGBLIGHT_USE_TIMER
     rgblight_timer_init();  // setup the timer
-#endif
 
     if (rgblight_config.enable) {
         rgblight_mode_noeeprom(rgblight_config.mode);
@@ -230,9 +228,7 @@ void rgblight_update_dword(uint32_t dword) {
     if (rgblight_config.enable)
         rgblight_mode_noeeprom(rgblight_config.mode);
     else {
-#ifdef RGBLIGHT_USE_TIMER
         rgblight_timer_disable();
-#endif
         rgblight_set();
     }
 }
@@ -300,13 +296,9 @@ void rgblight_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom) {
         dprintf("rgblight mode [NOEEPROM]: %u\n", rgblight_config.mode);
     }
     if (is_static_effect(rgblight_config.mode)) {
-#ifdef RGBLIGHT_USE_TIMER
         rgblight_timer_disable();
-#endif
     } else {
-#ifdef RGBLIGHT_USE_TIMER
         rgblight_timer_enable();
-#endif
     }
 #ifdef RGBLIGHT_USE_TIMER
     animation_status.restart = true;
@@ -354,9 +346,7 @@ void rgblight_disable(void) {
     rgblight_config.enable = 0;
     eeconfig_update_rgblight(rgblight_config.raw);
     dprintf("rgblight disable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
-#ifdef RGBLIGHT_USE_TIMER
     rgblight_timer_disable();
-#endif
     RGBLIGHT_SPLIT_SET_CHANGE_MODE;
     wait_ms(50);
     rgblight_set();
@@ -365,9 +355,7 @@ void rgblight_disable(void) {
 void rgblight_disable_noeeprom(void) {
     rgblight_config.enable = 0;
     dprintf("rgblight disable [NOEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
-#ifdef RGBLIGHT_USE_TIMER
     rgblight_timer_disable();
-#endif
     RGBLIGHT_SPLIT_SET_CHANGE_MODE;
     wait_ms(50);
     rgblight_set();