Clueboard 66% Hotswap Support (#5204)

* Initial Clueboard 66% arm support

* Fix LAYOUT_66_ansi

* wip

* Bring this branch up to date with led_matrix

* Get Clueboard 66% hotswap working with led_matrix

* stm32 cleanup

* Fix compiling for clueboard 66% hotswap prototype

* Reduce the size of the prototype firmware

keyboards/clueboard/66_hotswap/gen1/led.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2017 skully <skullydazed@gmail.com>
+ *
+ * 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/>.
+*/
+
+#include "hal.h"
+#include "backlight.h"
+#include "led.h"
+#include "printf.h"