[ARM] Use #defined constants for manipulating v6 hardware PTE bits

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index a9892eb..8bd4c0f 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -188,12 +188,18 @@
 /*
  *   - extended small page/tiny page
  */
+#define PTE_EXT_XN		(1 << 0)	/* v6 */
 #define PTE_EXT_AP_MASK		(3 << 4)
+#define PTE_EXT_AP0		(1 << 4)
+#define PTE_EXT_AP1		(2 << 4)
 #define PTE_EXT_AP_UNO_SRO	(0 << 4)
-#define PTE_EXT_AP_UNO_SRW	(1 << 4)
-#define PTE_EXT_AP_URO_SRW	(2 << 4)
-#define PTE_EXT_AP_URW_SRW	(3 << 4)
+#define PTE_EXT_AP_UNO_SRW	(PTE_EXT_AP0)
+#define PTE_EXT_AP_URO_SRW	(PTE_EXT_AP1)
+#define PTE_EXT_AP_URW_SRW	(PTE_EXT_AP1|PTE_EXT_AP0)
 #define PTE_EXT_TEX(x)		((x) << 6)	/* v5 */
+#define PTE_EXT_APX		(1 << 9)	/* v6 */
+#define PTE_EXT_SHARED		(1 << 10)	/* v6 */
+#define PTE_EXT_NG		(1 << 11)	/* v6 */
 
 /*
  *   - small page