[SG] Update drivers to use sg helpers

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/scsi/sym53c416.c b/drivers/scsi/sym53c416.c
index 8befab7..90cee94 100644
--- a/drivers/scsi/sym53c416.c
+++ b/drivers/scsi/sym53c416.c
@@ -196,7 +196,7 @@
 
 #define MAXHOSTS 4
 
-#define SG_ADDRESS(buffer)     ((char *) (page_address((buffer)->page)+(buffer)->offset))
+#define SG_ADDRESS(buffer)     ((char *) sg_virt((buffer)))
 
 enum phases
 {