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

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index 352db98..75e6552 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -111,12 +111,6 @@
 	mcr	p15, 0, r1, c13, c0, 1		@ set context ID
 	mov	pc, lr
 
-#define nG	(1 << 11)
-#define APX	(1 << 9)
-#define AP1	(1 << 5)
-#define AP0	(1 << 4)
-#define XN	(1 << 0)
-
 /*
  *	cpu_v6_set_pte(ptep, pte)
  *
@@ -141,22 +135,22 @@
 
 	bic	r2, r1, #0x00000ff0
 	bic	r2, r2, #0x00000003
-	orr	r2, r2, #AP0 | 2
+	orr	r2, r2, #PTE_EXT_AP0 | 2
 
 	tst	r1, #L_PTE_WRITE
 	tstne	r1, #L_PTE_DIRTY
-	orreq	r2, r2, #APX
+	orreq	r2, r2, #PTE_EXT_APX
 
 	tst	r1, #L_PTE_USER
-	orrne	r2, r2, #AP1 | nG
-	tstne	r2, #APX
-	bicne	r2, r2, #APX | AP0
+	orrne	r2, r2, #PTE_EXT_AP1 | PTE_EXT_NG
+	tstne	r2, #PTE_EXT_APX
+	bicne	r2, r2, #PTE_EXT_APX | PTE_EXT_AP0
 
 	tst	r1, #L_PTE_YOUNG
-	biceq	r2, r2, #APX | AP1 | AP0
+	biceq	r2, r2, #PTE_EXT_APX | PTE_EXT_AP_MASK
 
 @	tst	r1, #L_PTE_EXEC
-@	orreq	r2, r2, #XN
+@	orreq	r2, r2, #PTE_EXT_XN
 
 	tst	r1, #L_PTE_PRESENT
 	moveq	r2, #0