VIA Support: LFKPad (#11461)

* VIA Support: LFKPad

* Condense two mostly redundant rules.mk files

* Set BOOTMAGIC_ENABLE to lite as advised by VIA tutorial

keyboards/lfkeyboards/lfkpad/keymaps/default/rules.mk

@@ -1,42 +0,0 @@
-# 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
-MOUSEKEY_ENABLE = no            # Mouse keys
-EXTRAKEY_ENABLE = yes           # Audio control and System control
-CONSOLE_ENABLE = no             # Console for debug
-COMMAND_ENABLE = no             # Commands for debug and configuration
-NKRO_ENABLE = no               # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-BACKLIGHT_ENABLE = no          # Enable keyboard backlight functionality
-MIDI_ENABLE = no                # MIDI controls
-AUDIO_ENABLE = no               # 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.
-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
-
-
-
-
-# # Set the LFK78 hardware version. This is defined in rules.mk, but can be overidden here if desired
-# #
-# # RevB - first public release, uses atmega32u4, has audio, ISSI matrix split between RGB and backlight
-# # RevC/D - at90usb1286, no audio, ISSI device 0 is backlight, 4 is RGB
-# #
-# # Set to B, C or D
-# LFK_REV = D
-
-# ifeq ($(LFK_REV), B)
-#   MCU = atmega32u4
-# else
-#   MCU = at90usb1286
-# endif
-# OPT_DEFS += -DLFK_REV_$(LFK_REV)
-# OPT_DEFS += -DUSB_PRODUCT=\"LFK_Rev$(LFK_REV)\"