ARM: pgtable: introduce pteval_t to represent a pte value

This makes everywhere dealing with pte values use the same type.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
index 6630620..36960df 100644
--- a/arch/arm/mm/mm.h
+++ b/arch/arm/mm/mm.h
@@ -16,7 +16,7 @@
 }
 
 struct mem_type {
-	unsigned int prot_pte;
+	pteval_t prot_pte;
 	unsigned int prot_l1;
 	unsigned int prot_sect;
 	unsigned int domain;