Keyboard: Initial i75 port (#4553)

* Initial i75 port - currently supporting promicro and teensy2

* Initial i75 port - review fixes

keyboards/40percentclub/i75/i75.h

@@ -0,0 +1,24 @@
+/* Copyright 2018
+ *
+ * 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"
+
+#ifdef KEYBOARD_40percentclub_i75_promicro
+    #include "promicro.h"
+#elif KEYBOARD_40percentclub_i75_teensy2
+    #include "teensy2.h"
+#endif