x86: unify io_remap_pfn_range

Impact: cleanup

Unify io_remap_pfn_range.  Don't demacro yet.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 18afcd3..9754d06 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -524,6 +524,9 @@
 	return npg >> (20 - PAGE_SHIFT);
 }
 
+#define io_remap_pfn_range(vma, vaddr, pfn, size, prot)	\
+	remap_pfn_range(vma, vaddr, pfn, size, prot)
+
 #if PAGETABLE_LEVELS > 2
 static inline int pud_none(pud_t pud)
 {