kbuild: remove redundant quiet_modtag for $(obj-m)

Backported from kernel
commit b39a691617e4 commit ("kbuild: remove redundant quiet_modtag for $(obj-m)")

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index fa91445..2944629 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -125,8 +125,6 @@
 $(real-objs-m:.o=.s)  : quiet_modtag := [M]
 $(real-objs-m:.o=.lst): quiet_modtag := [M]
 
-$(obj-m)              : quiet_modtag := [M]
-
 # Default for not multi-part modules
 modname = $(basetarget)