kbuild: arm - use generic asm-offsets.h support

Delete obsoleted stuff from arch Makefile and rename
constants.h to asm-offsets.h

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/arch/arm/lib/copy_page.S b/arch/arm/lib/copy_page.S
index 4c38abd..6811796 100644
--- a/arch/arm/lib/copy_page.S
+++ b/arch/arm/lib/copy_page.S
@@ -11,7 +11,7 @@
  */
 #include <linux/linkage.h>
 #include <asm/assembler.h>
-#include <asm/constants.h>
+#include <asm/asm-offsets.h>
 
 #define COPY_COUNT (PAGE_SZ/64 PLD( -1 ))
 
diff --git a/arch/arm/lib/csumpartialcopyuser.S b/arch/arm/lib/csumpartialcopyuser.S
index 46a2dc9..333bca2 100644
--- a/arch/arm/lib/csumpartialcopyuser.S
+++ b/arch/arm/lib/csumpartialcopyuser.S
@@ -13,7 +13,7 @@
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 #include <asm/errno.h>
-#include <asm/constants.h>
+#include <asm/asm-offsets.h>
 
 		.text
 
diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S
index 64aa6f4..d204018 100644
--- a/arch/arm/lib/getuser.S
+++ b/arch/arm/lib/getuser.S
@@ -26,7 +26,7 @@
  * Note that ADDR_LIMIT is either 0 or 0xc0000000.
  * Note also that it is intended that __get_user_bad is not global.
  */
-#include <asm/constants.h>
+#include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
 #include <asm/errno.h>
 
diff --git a/arch/arm/lib/putuser.S b/arch/arm/lib/putuser.S
index b09398d..4593e9c 100644
--- a/arch/arm/lib/putuser.S
+++ b/arch/arm/lib/putuser.S
@@ -26,7 +26,7 @@
  * Note that ADDR_LIMIT is either 0 or 0xc0000000
  * Note also that it is intended that __put_user_bad is not global.
  */
-#include <asm/constants.h>
+#include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
 #include <asm/errno.h>