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/ppc64/mm/hash_low.S b/arch/ppc64/mm/hash_low.S
index 35eb49e..ee5a5d3 100644
--- a/arch/ppc64/mm/hash_low.S
+++ b/arch/ppc64/mm/hash_low.S
@@ -16,7 +16,7 @@
 #include <asm/page.h>
 #include <asm/types.h>
 #include <asm/ppc_asm.h>
-#include <asm/offsets.h>
+#include <asm/asm-offsets.h>
 #include <asm/cputable.h>
 
 	.text
diff --git a/arch/ppc64/mm/slb_low.S b/arch/ppc64/mm/slb_low.S
index 698d6b9..a3a03da 100644
--- a/arch/ppc64/mm/slb_low.S
+++ b/arch/ppc64/mm/slb_low.S
@@ -21,7 +21,7 @@
 #include <asm/page.h>
 #include <asm/mmu.h>
 #include <asm/ppc_asm.h>
-#include <asm/offsets.h>
+#include <asm/asm-offsets.h>
 #include <asm/cputable.h>
 
 /* void slb_allocate(unsigned long ea);