kbuild: Fix up moving of modpost

A few small issues to fix the moving of modpost.
A few files was missing in the commit and one change needed.
Also bk ignored the files in their new location.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/Makefile

@@ -9,7 +9,7 @@ host-progs	:= conmakehash kallsyms pnmtologo bin2c
 always		:= $(host-progs)
 
 subdir-$(CONFIG_MODVERSIONS)	+= genksyms
-subdir-y	+= modpost
+subdir-y	+= mod
 
 # Let clean descend into subdirs
 subdir-	+= basic lxdialog kconfig package

scripts/mod/Makefile

+host-progs	:= modpost mk_elfconfig
+always		:= $(host-progs) empty.o
+
+modpost-objs	:= modpost.o file2alias.o sumversion.o
+
+# dependencies on generated files need to be listed explicitly
+
+$(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/mod/file2alias.c

@@ -27,7 +27,7 @@ typedef unsigned char  __u8;
 /* Big exception to the "don't include kernel headers into userspace, which
  * even potentially has different endianness and word sizes, since 
  * we handle those differences explicitly below */
-#include "../include/linux/mod_devicetable.h"
+#include "../../include/linux/mod_devicetable.h"
 
 #define ADD(str, sep, cond, field)                              \
 do {                                                            \