kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h support

Delete obsoleted parts form arch makefiles and rename to asm-offsets.h

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/arch/m68k/ifpsp060/iskeleton.S b/arch/m68k/ifpsp060/iskeleton.S
index 803a6ec..4ba2c74 100644
--- a/arch/m68k/ifpsp060/iskeleton.S
+++ b/arch/m68k/ifpsp060/iskeleton.S
@@ -36,7 +36,7 @@
 
 #include <linux/linkage.h>
 #include <asm/entry.h>
-#include <asm/offsets.h>
+#include <asm/asm-offsets.h>
 
 
 |################################