Migrate RN42 to UART driver and refactor (#15492)

drivers/bluetooth/rn42.h

@@ -0,0 +1,25 @@
+/* Copyright 2021
+ *
+ * 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 "report.h"
+
+void rn42_init(void);
+
+void rn42_send_keyboard(report_keyboard_t *report);
+
+void rn42_send_mouse(report_mouse_t *report);
+
+void rn42_send_consumer(uint16_t data);