Change some vars and functions to be static.

Signed-off-by: Florian La Roche <Florian.LaRoche@gmail.com>
diff --git a/drivers/ufs/ufs.c b/drivers/ufs/ufs.c
index 2351c9b..b2c1046 100644
--- a/drivers/ufs/ufs.c
+++ b/drivers/ufs/ufs.c
@@ -591,7 +591,7 @@
 	ufs_query(QUERY_WRITE_DESC, idn, index, 0, buf, size);
 }
 
-void ufs_read_capacity(int lun, unsigned int *num, unsigned int *size)
+static void ufs_read_capacity(int lun, unsigned int *num, unsigned int *size)
 {
 	utp_utrd_t utrd;
 	resp_upiu_t *resp;