kbuild: always create directories of targets

Currently, the directories of objects are automatically created
only for O= builds.

It should not hurt to cater to this for in-tree builds too.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 7ba6a75..246426f 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -515,15 +515,13 @@
 
 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
 
-ifdef building_out_of_srctree
 # Create directories for object files if they do not exist
-obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
+obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets))))
 # If targets exist, their directories apparently exist. Skip mkdir.
 existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
 obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
 ifneq ($(obj-dirs),)
 $(shell mkdir -p $(obj-dirs))
 endif
-endif
 
 .PHONY: $(PHONY)