Update arch/ to use sg helpers

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c
index 9d4e4b5..ef490e1 100644
--- a/arch/m68k/kernel/dma.c
+++ b/arch/m68k/kernel/dma.c
@@ -121,7 +121,7 @@
 	int i;
 
 	for (i = 0; i < nents; sg++, i++) {
-		sg->dma_address = page_to_phys(sg->page) + sg->offset;
+		sg->dma_address = sg_phys(sg);
 		dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
 	}
 	return nents;