kbuild: Move modpost files to a new subdir scripts/mod

Move modpost and support files to scripts/mod.
Directory named mod by Sam.

From: Brian Gerst <bgerst@didntduck.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/Makefile

@@ -5,24 +5,11 @@
 # docproc: 	 Preprocess .tmpl file in order to generate .sgml docs
 # conmakehash:	 Create arrays for initializing the kernel console tables
 
-host-progs	:= conmakehash kallsyms modpost mk_elfconfig pnmtologo bin2c
-always		:= $(host-progs) empty.o
-
-modpost-objs	:= modpost.o file2alias.o sumversion.o
+host-progs	:= conmakehash kallsyms pnmtologo bin2c
+always		:= $(host-progs)
 
 subdir-$(CONFIG_MODVERSIONS)	+= genksyms
+subdir-y	+= modpost
 
 # Let clean descend into subdirs
 subdir-	+= basic lxdialog kconfig package
-
-# dependencies on generated files need to be listed explicitly
-
-$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
-
-quiet_cmd_elfconfig = MKELF   $@
-      cmd_elfconfig = $(obj)/mk_elfconfig $(ARCH) < $< > $@
-
-$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE
-	$(call if_changed,elfconfig)
-
-targets += elfconfig.h

scripts/Makefile.modpost

@@ -50,7 +50,7 @@ _modpost: $(modules)
 # Step 2), invoke modpost
 #  Includes step 3,4
 quiet_cmd_modpost = MODPOST
-      cmd_modpost = scripts/modpost \
+      cmd_modpost = scripts/mod/modpost \
 	$(if $(KBUILD_EXTMOD),-i,-o) $(symverfile) \
 	$(filter-out FORCE,$^)