[SPARC]: Respect vm_page_prot in io_remap_page_range().

Make sure the callers do a pgprot_noncached() on
vma->vm_page_prot.

Pointed out by Hugh Dickens.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/video/sbuslib.c

@@ -58,6 +58,8 @@ int sbusfb_mmap_helper(struct sbus_mmap_map *map,
 	/* To stop the swapper from even considering these pages */
 	vma->vm_flags |= (VM_IO | VM_RESERVED);
 	
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
 	/* Each page, see which map applies */
 	for (page = 0; page < size; ){
 		map_size = 0;