Lfkeyboards updates (#2421)

* Update smk65 fn layer, add iso

* Added Fn layer to ISO keymap

* Fix error when backlight is disabled but lighting isn't

* Remove broke mini1800 iso map

* Add keymaps

* Add LFKPad

* Add split delete to lfk78

* Typo

* Custom keymap

keyboards/lfkeyboards/lfk87/keymaps/gbchk/rules.mk

@@ -0,0 +1,54 @@
+# Build Options
+#   change to "no" to disable the options, or define them in the Makefile in
+#   the appropriate keymap folder that will get included automatically
+#
+
+BOOTMAGIC_ENABLE = no           # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no            # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes           # Audio control and System control(+450)
+CONSOLE_ENABLE = no             # Console for debug(+400)
+COMMAND_ENABLE = no             # Commands for debug and configuration
+NKRO_ENABLE = yes               # 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
+MIDI_ENABLE = no                # MIDI controls
+AUDIO_ENABLE = yes              # Audio output on port C6
+UNICODE_ENABLE = no             # Unicode
+BLUETOOTH_ENABLE = no           # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes           # Enable RGB underlight
+RGBLIGHT_CUSTOM_DRIVER = yes    # RGB code is implemented in lefkeyboards, not WS2812
+SLEEP_LED_ENABLE = yes          # Breathing sleep LED during USB suspend
+TAP_DANCE_ENABLE = no
+
+ISSI_ENABLE = yes			# If the I2C pullup resistors aren't install this must be disabled
+WATCHDOG_ENABLE = no		# Resets keyboard if matrix_scan isn't run every 250ms
+
+
+ifndef QUANTUM_DIR
+	include ../../../../Makefile
+endif
+
+ifeq ($(strip $(ISSI_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DISSI_ENABLE
+endif
+
+ifeq ($(strip $(WATCHDOG_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DWATCHDOG_ENABLE
+endif
+
+
+# Override the LFK87 hardware version.
+#
+# A - Green PCB. at90usb1286 Only 3 exist
+# B - We don't talk about RevB
+# C-D - Black PCB. at90usb646 First public release
+#
+# LFK_REV = C
+
+# ifeq ($(LFK_REV), A)
+# 	MCU = at90usb1286
+# 	OPT_DEFS += -DBOOTLOADER_SIZE=8192
+# else
+# 	MCU = at90usb646
+# 	OPT_DEFS += -DBOOTLOADER_SIZE=4096
+# endif
+# OPT_DEFS += -DLFK_TKL_REV_$(LFK_REV)