ARM: pgtable: use phys_addr_t for physical addresses

Ensure that physical addresses are typed as phys_addr_t

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index d00ef7e..30b3a07 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -322,7 +322,7 @@
 
 static inline pte_t *pmd_page_vaddr(pmd_t pmd)
 {
-	unsigned long ptr;
+	phys_addr_t ptr;
 
 	ptr = pmd_val(pmd) & ~(PTRS_PER_PTE * sizeof(void *) - 1);
 	ptr += PTRS_PER_PTE * sizeof(void *);