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/lfk78/keymaps/split_bs_osx/rules.mk

@@ -0,0 +1,47 @@
+# 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 WS2812 RGB underlight.  Do not enable this with audio at the same time.
+RGBLIGHT_CUSTOM_DRIVER = yes    # RGB code is implemented in lefkeyboards, not qmk base
+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
+CAPSLOCK_LED = no              # Toggle back light LED of Caps Lock
+
+ifndef QUANTUM_DIR
+    include ../../../../Makefile
+endif
+
+ifeq ($(strip $(ISSI_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DISSI_ENABLE
+endif
+
+ifeq ($(strip $(WATCHDOG_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DWATCHDOG_ENABLE
+endif
+
+ifeq ($(strip $(CAPSLOCK_LED)), yes)
+    TMK_COMMON_DEFS += -DCAPSLOCK_LED
+endif
+
+# Override the LFK78 hardware version:
+#
+# B   - first public release, uses atmega32u4, has audio, ISSI matrix split between RGB and backlight
+# C-H - at90usb1286, no audio, ISSI device 0 is backlight, 4 is RGB
+# J   - at90usb646, C6 audio, ISSI device 0 is backlight, 4 is RGB
+# LFK_REV = J