[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/onekey.h

@@ -1,5 +1,20 @@
-#ifndef ONEKEY_H
-#define ONEKEY_H
+/* Copyright 2019
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
 
 #include "quantum.h"
 
@@ -8,5 +23,3 @@
   ) { \
     { k00 }  \
 }
-
-#endif