[Keyboard] Added ymdk split64 based on walston's work (#9183)

* Added ymdk split64 based on walson's work

* Commented out features on walston's keymap as it was too big to compile

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/keymaps/daed/keymap.c

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/matrix.c

* keymap changes

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/matrix.c

* Update keyboards/ymdk_sp64/rules.mk

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/readme.md

* Update keyboards/ymdk_sp64/rules.mk

* Update keyboards/ymdk_sp64/config.h

* Update keyboards/ymdk_sp64/rules.mk

* Update keyboards/ymdk_sp64/ymdk_sp64.c

* Update keyboards/ymdk_sp64/keymaps/walston/rules.mk

* Update keyboards/ymdk_sp64/readme.md

* Made requested changes and moved keyboard under ymdk directory

* Update keyboards/ymdk/ymdk_sp64/keymaps/walston/keymap.c

* Update keyboards/ymdk/ymdk_sp64/config.h

* Update keyboards/ymdk/ymdk_sp64/config.h

* Update keyboards/ymdk/ymdk_sp64/keymaps/default/keymap.c

* Update keyboards/ymdk/ymdk_sp64/keymaps/default/keymap.c

* updated changes for pr 9183

* updated changes for pr 9183

* updated changes for pr 9183

* Removed redundant "QMK_KEYBOARD_H" include

keyboards/ymdk/sp64/rules.mk

@@ -0,0 +1,32 @@
+# MCU name
+MCU = atmega32a
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
+BOOTLOADER = bootloadHID
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no        # Console for debug
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+# NKRO_ENABLE = yes		# USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+#BACKLIGHT_ENABLE = yes       # Enable keyboard backlight functionality
+AUDIO_ENABLE = no    # There is no speaker on this PCB
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+CUSTOM_MATRIX = yes
+
+# Needed for underglow
+WS2812_DRIVER = i2c
+
+SRC += matrix.c 
+QUANTUM_LIB_SRC += i2c_master.c