kbuild: refactor part-of-module

# ---------------------------------------------------------------------------

# Default is built-in, unless we know otherwise

$(foreach x, i lst o s, $(patsubst %.o,%.$(x),$(real-obj-m))): \

	part-of-module := y

modkern_cflags =                                          \

	$(if $(part-of-module),                           \

		$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \

		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))

quiet_modtag = $(if $(part-of-module),[M],   )

$(real-obj-m)        : part-of-module := y

$(real-obj-m:.o=.i)  : part-of-module := y

$(real-obj-m:.o=.s)  : part-of-module := y

$(real-obj-m:.o=.lst): part-of-module := y

quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@

cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<