Set backlight and RGB pins for AVR onekeys (#8533)

* Set backlight and RGB pins for AVR onekeys

* Set pin for ADC as well

* Define ADC_PIN for F4 blackpills

* Use A0 for F4 ADCs

* Set ADC pins for F0 and F1

keyboards/handwired/onekey/keymaps/adc/keymap.c

@@ -2,10 +2,6 @@
 #include "analog.h"
 #include <stdio.h>
 
-#ifndef ADC_PIN
-#    define ADC_PIN A0
-#endif
-
 enum custom_keycodes {
     ADC_SAMPLE = SAFE_RANGE,
 };