Fix the LFKeyboards so they work with the QMK Configurator (#4591)

* Make layer_info weak so it works with QMK Configurator

* Fix lfk87 compile issue

* Add fixes for lfkpad

keyboards/lfkeyboards/lfkpad/rules.mk

@@ -11,3 +11,31 @@ ARCH = AVR8
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
 LAYOUTS = numpad_6x4
+
+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 = 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
+
+
+ifeq ($(strip $(ISSI_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DISSI_ENABLE
+endif
+
+ifeq ($(strip $(WATCHDOG_ENABLE)), yes)
+    TMK_COMMON_DEFS += -DWATCHDOG_ENABLE
+endif