explicitly add dcd source file without vendor/family

hw/bsp/lpc18/family.mk

@@ -18,6 +18,7 @@ CFLAGS += -Wno-error=unused-parameter -Wno-error=strict-prototypes
 MCU_DIR = hw/mcu/nxp/lpcopen/lpc18xx/lpc_chip_18xx
 
 SRC_C += \
+	src/portable/nxp/transdimension/dcd_transdimension.c \
 	$(MCU_DIR)/../gcc/cr_startup_lpc18xx.c \
 	$(MCU_DIR)/src/chip_18xx_43xx.c \
 	$(MCU_DIR)/src/clock_18xx_43xx.c \
@@ -30,9 +31,5 @@ INC += \
 	$(TOP)/$(MCU_DIR)/inc \
 	$(TOP)/$(MCU_DIR)/inc/config_18xx
 
-# For TinyUSB port source
-VENDOR = nxp
-CHIP_FAMILY = transdimension
-
 # For freeRTOS port source
 FREERTOS_PORT = ARM_CM3