changing up the makefile a bit

tmk_core/protocol/lufa.mk

@@ -17,7 +17,7 @@ LUFA_SRC = $(LUFA_DIR)/lufa.c \
 	   $(LUFA_DIR)/descriptor.c \
 	   $(LUFA_SRC_USB)
 
-ifdef MIDI_ENABLE
+ifeq ($(MIDI_ENABLE), yes)
 	LUFA_SRC += $(LUFA_DIR)/midi/midi.c \
 	   $(LUFA_DIR)/midi/midi_device.c \
 	   $(LUFA_DIR)/midi/bytequeue/bytequeue.c \
@@ -25,7 +25,7 @@ ifdef MIDI_ENABLE
 	   $(LUFA_SRC_USBCLASS)
 endif
 
-ifdef BLUETOOTH_ENABLE
+ifeq ($(BLUETOOTH_ENABLE), yes)
 	LUFA_SRC += $(LUFA_DIR)/bluetooth.c \
 	$(TMK_DIR)/protocol/serial_uart.c
 endif