xmc4500 ported, cdc msc example run fine

hw/bsp/xmc4000/family.mk

@@ -18,6 +18,8 @@ CFLAGS += \
 # mcu driver cause following warnings
 #CFLAGS += -Wno-error=shadow -Wno-error=cast-align
 
+SKIP_NANOLIB = 1
+
 SRC_C += \
 	src/portable/synopsys/dwc2/dcd_dwc2.c \
 	$(MCU_DIR)/Newlib/syscalls.c \
@@ -25,6 +27,7 @@ SRC_C += \
 	$(MCU_DIR)/XMCLib/src/xmc4_gpio.c \
 	$(MCU_DIR)/XMCLib/src/xmc4_scu.c
 
+
 SRC_S += $(MCU_DIR)/CMSIS/Infineon/COMPONENT_$(MCU_VARIANT)/Source/TOOLCHAIN_GCC_ARM/startup_$(MCU_VARIANT).S
 
 INC += \