Merge "scripts: Makefile: add support to use external DTC" into msm-4.9

$(obj)/%.dtb.S: $(obj)/%.dtb

	$(call cmd,dt_S_dtb)

ifneq ($(DTC_EXT),)

DTC = $(DTC_EXT)

else

DTC = $(objtree)/scripts/dtc/dtc

endif

quiet_cmd_dtc = DTC     $@

cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \

	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \

# scripts/dtc makefile

hostprogs-y	:= dtc

ifeq ($(DTC_EXT),)

always		:= $(hostprogs-y)

endif

dtc-objs	:= dtc.o flattree.o fstree.o data.o livetree.o treesource.o \

		   srcpos.o checks.o util.o