[Keyboard] Refactor of onekey to support multiple development boards (#6017)

* Initial refactor of onekey to support multiple development boards

* Fixes to get teensy lc && 3.2 working

* Add pin tables

* Add caveats to Teensy boards

* Correct bootloader for Elite-C

keyboards/handwired/onekey/teensy_lc/mcuconf.h

@@ -0,0 +1,45 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#ifndef _MCUCONF_H_
+#define _MCUCONF_H_
+
+#define KL2x_MCUCONF
+
+/*
+ * HAL driver system settings.
+ */
+/* PEE mode - 48MHz system clock driven by (16 MHz) external crystal. */
+#define KINETIS_MCG_MODE            KINETIS_MCG_MODE_PEE
+#define KINETIS_PLLCLK_FREQUENCY    96000000UL
+#define KINETIS_SYSCLK_FREQUENCY    48000000UL
+
+/*
+ * SERIAL driver system settings.
+ */
+#define KINETIS_SERIAL_USE_UART0              TRUE
+
+/*
+ * USB driver settings
+ */
+#define KINETIS_USB_USE_USB0                  TRUE
+
+/* Need to redefine this, since the default (configured for K20x) might not apply
+ *   2 for Teensy LC
+ *   5 for Teensy 3.x */
+#define KINETIS_USB_USB0_IRQ_PRIORITY         2
+
+#endif /* _MCUCONF_H_ */