kbuild: reuse suffix-search to refactor multi_depend

The complicated part of multi_depend is the same as suffix-search.

Reuse it.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

scripts/Makefile.lib

@@ -238,7 +238,7 @@ endif
 define multi_depend
 $(foreach m, $(notdir $1), \
 	$(eval $(obj)/$m: \
-	$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
+	$(addprefix $(obj)/, $(call suffix-search, $m, $2, $3))))
 endef
 
 # Copy a file