kbuild: alpha,x86_64 use generic asm-offsets.h support

Delete obsolete stuff from arch makefiles
Rename .h file to asm-offsets.h

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

arch/alpha/Makefile

@@ -108,20 +108,9 @@ $(boot)/vmlinux.gz: vmlinux
 bootimage bootpfile bootpzfile: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
-
-prepare: include/asm-$(ARCH)/asm_offsets.h
-
-arch/$(ARCH)/kernel/asm-offsets.s: include/asm include/linux/version.h \
-				   include/config/MARKER
-
-include/asm-$(ARCH)/asm_offsets.h: arch/$(ARCH)/kernel/asm-offsets.s
-	$(call filechk,gen-asm-offsets)
-
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
 
-CLEAN_FILES += include/asm-$(ARCH)/asm_offsets.h
-
 define archhelp
   echo '* boot		- Compressed kernel image (arch/alpha/boot/vmlinux.gz)'
   echo '  bootimage	- SRM bootable image (arch/alpha/boot/bootimage)'

arch/alpha/kernel/entry.S

@@ -5,7 +5,7 @@
  */
 
 #include <linux/config.h>
-#include <asm/asm_offsets.h>
+#include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
 #include <asm/pal.h>
 #include <asm/errno.h>

arch/alpha/kernel/head.S

@@ -9,7 +9,7 @@
 
 #include <linux/config.h>
 #include <asm/system.h>
-#include <asm/asm_offsets.h>
+#include <asm/asm-offsets.h>
 
 .globl swapper_pg_dir
 .globl _stext

arch/alpha/lib/dbg_stackcheck.S

@@ -5,7 +5,7 @@
  * Verify that we have not overflowed the stack.  Oops if we have.
  */
 
-#include <asm/asm_offsets.h>
+#include <asm/asm-offsets.h>
 
 	.text
 	.set noat

arch/alpha/lib/dbg_stackkill.S

@@ -6,7 +6,7 @@
  * uninitialized local variables in the act.
  */
 
-#include <asm/asm_offsets.h>
+#include <asm/asm-offsets.h>
 
 	.text
 	.set noat