Added YMD75 support (#2968)

* Adding ymd75 files

* Added YMD75 support, inc layout json

* Added YMD75 support

keyboards/ymd75/rules.mk

@@ -0,0 +1,66 @@
+# Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
+# Modified 2018 Wayne Jones (WarmCatUK) <waynekjones@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/>.
+
+# MCU name
+MCU = atmega32a
+PROTOCOL = VUSB
+
+# unsupported features for now
+NO_UART = yes
+NO_SUSPEND_POWER_DOWN = yes
+
+# processor frequency
+F_CPU = 12000000
+
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = bootloadHID
+
+# build options
+BOOTMAGIC_ENABLE = yes
+MOUSEKEY_ENABLE = no
+EXTRAKEY_ENABLE = yes
+CONSOLE_ENABLE = no
+COMMAND_ENABLE = yes
+BACKLIGHT_ENABLE = yes
+RGBLIGHT_ENABLE = yes
+RGBLIGHT_CUSTOM_DRIVER = yes
+NKRO_ENABLE = no
+# Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+
+
+DISABLE_WS2812 = no
+
+KEY_LOCK_ENABLE = yes
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+
+#OPT_DEFS = -DDEBUG_LEVEL=0
+
+# custom matrix setup
+CUSTOM_MATRIX = yes
+SRC = matrix.c i2c.c backlight.c
+
+ifndef QUANTUM_DIR
+	include ../../../../Makefile
+endif
+
+
+# programming options
+PROGRAM_CMD = ./keyboards/ps2avrGB/program $(TARGET).hex