[ARM] Unuse another Linux PTE bit

L_PTE_ASID is not really required to be stored in every PTE, since we
can identify it via the address passed to set_pte_at().  So, create
set_pte_ext() which takes the address of the PTE to set, the Linux
PTE value, and the additional CPU PTE bits which aren't encoded in
the Linux PTE value.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 4654405..a43d280 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -40,7 +40,7 @@
 
 static inline void
 remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
-	       unsigned long phys_addr, pgprot_t pgprot)
+	       unsigned long phys_addr, pgprot_t prot)
 {
 	unsigned long end;
 
@@ -53,7 +53,7 @@
 		if (!pte_none(*pte))
 			goto bad;
 
-		set_pte(pte, pfn_pte(phys_addr >> PAGE_SHIFT, pgprot));
+		set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot), 0);
 		address += PAGE_SIZE;
 		phys_addr += PAGE_SIZE;
 		pte++;