[Keyboard] Add UM-A Keyboard (#15584)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: online <33636898+online@users.noreply.github.com>

keyboards/merge/uma/config.h

@@ -0,0 +1,47 @@
+/* Copyright 2021 duoshock 
+ * 
+ * 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 "config_common.h"
+
+#define VENDOR_ID       0x4D65
+#define PRODUCT_ID      0x3232
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    Merge
+#define PRODUCT         UM-A
+
+#define MATRIX_ROWS 10
+#define MATRIX_COLS 8
+
+#define MATRIX_ROW_PINS { B0, B1, B2, B3, B7 }
+#define MATRIX_COL_PINS { F0, F1, F4, F5, F6, F7, D6, D4 }
+#define UNUSED_PINS
+
+#define BACKLIGHT_PIN C6
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+#define SOFT_SERIAL_PIN D2
+#define SPLIT_USB_DETECT
+#define SPLIT_MODS_ENABLE
+
+#define DEBOUNCE 5
+
+#define ENCODERS_PAD_A { B4 }
+#define ENCODERS_PAD_B { B5 }
+
+#define BOOTMAGIC_LITE_ROW 0
+#define BOOTMAGIC_LITE_COLUMN 0