Move protocol makefiles into their respective folders (#21332)

* Move protocol makefiles into their respective folders

* Fix USB-USB converter

tmk_core/protocol/lufa/lufa.mk

@@ -0,0 +1,52 @@
+LUFA_DIR = protocol/lufa
+
+# Path to the LUFA library
+LUFA_PATH = $(LIB_PATH)/lufa
+
+# Create the LUFA source path variables by including the LUFA makefile
+ifneq (, $(wildcard $(LUFA_PATH)/LUFA/Build/lufa_sources.mk))
+    # New build system from 20120730
+    LUFA_ROOT_PATH = $(LUFA_PATH)/LUFA
+    DMBS_LUFA_PATH = $(LUFA_PATH)/LUFA/Build/LUFA
+    include $(LUFA_PATH)/LUFA/Build/lufa_sources.mk
+else
+    include $(LUFA_PATH)/LUFA/makefile
+endif
+
+LUFA_SRC = lufa.c \
+	usb_descriptor.c \
+	$(LUFA_SRC_USB)
+
+ifeq ($(strip $(MIDI_ENABLE)), yes)
+	LUFA_SRC += $(LUFA_ROOT_PATH)/Drivers/USB/Class/Device/MIDIClassDevice.c
+endif
+
+ifeq ($(strip $(VIRTSER_ENABLE)), yes)
+	LUFA_SRC += $(LUFA_ROOT_PATH)/Drivers/USB/Class/Device/CDCClassDevice.c
+endif
+
+SRC += $(LUFA_SRC)
+SRC += $(LUFA_DIR)/usb_util.c
+
+# Search Path
+VPATH += $(TMK_PATH)/$(LUFA_DIR)
+VPATH += $(LUFA_PATH)
+
+# LUFA library compile-time options and predefined tokens
+LUFA_OPTS  = -DUSB_DEVICE_ONLY
+LUFA_OPTS += -DUSE_FLASH_DESCRIPTORS
+LUFA_OPTS += -DUSE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
+LUFA_OPTS += -DFIXED_CONTROL_ENDPOINT_SIZE=8
+LUFA_OPTS += -DFIXED_NUM_CONFIGURATIONS=1
+
+# Remote wakeup fix for ATmega16/32U2        https://github.com/tmk/tmk_keyboard/issues/361
+ifneq (,$(filter $(MCU), at90usb162 atmega16u2 atmega32u2))
+	LUFA_OPTS += -DNO_LIMITED_CONTROLLER_CONNECT
+endif
+
+OPT_DEFS += -DF_USB=$(F_USB)UL
+OPT_DEFS += -DARCH=ARCH_$(ARCH)
+OPT_DEFS += $(LUFA_OPTS)
+
+# This indicates using LUFA stack
+OPT_DEFS += -DPROTOCOL_LUFA