[ARM] Cleanup arch/arm/mm a little

Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm
references it.

Move the repeated definition of TOP_PTE into mm/mm.h, as well as
a few function prototypes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index 38769f5..ee96478 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -23,6 +23,8 @@
 
 #include <asm/mach/map.h>
 
+#include "mm.h"
+
 #define CPOLICY_UNCACHED	0
 #define CPOLICY_BUFFERED	1
 #define CPOLICY_WRITETHROUGH	2
@@ -35,8 +37,6 @@
 
 EXPORT_SYMBOL(pgprot_kernel);
 
-pmd_t *top_pmd;
-
 struct cachepolicy {
 	const char	policy[16];
 	unsigned int	cr_mask;
@@ -142,16 +142,6 @@
 
 #define FIRST_KERNEL_PGD_NR	(FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)
 
-static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
-{
-	return pmd_offset(pgd, virt);
-}
-
-static inline pmd_t *pmd_off_k(unsigned long virt)
-{
-	return pmd_off(pgd_offset_k(virt), virt);
-}
-
 /*
  * need to get a 16k page for level 1
  */