[Keyboard] Convert mf68_ble to keymap (#5287)

* Initial refactor of handwired bluetooth mod to keymap

* Initial refactor of handwired bluetooth mod to keymap - strip out unnecessary duplicate config, update readme

* Initial refactor of handwired bluetooth mod to keymap - reduce firmware size

* Initial refactor of handwired bluetooth mod to keymap - update readme image

keyboards/40percentclub/mf68/keymaps/mf68_ble/config.h

@@ -0,0 +1,43 @@
+/*
+Copyright 2012 Jun Wako <wakojun@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/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* Overrides for Feather 32u4 Bluefruit */
+
+/* USB Device descriptor parameter */
+#undef DESCRIPTION
+#define DESCRIPTION     Magicforce 68 BLE
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+*/
+#undef MATRIX_ROW_PINS
+#undef MATRIX_COL_PINS
+#undef UNUSED_PINS
+#define MATRIX_ROW_PINS { D1, D0, C6, D7, B5, B6, B7, D6 }
+#define MATRIX_COL_PINS { C7, F7, F6, F5, F4, F1, F0, D2, D3 }
+#define UNUSED_PINS {B5}