scsi: fix operator precedence warning

Fix operator precedence warning (from sparse), which results in the
data value always being 0:

drivers/scsi/qla4xxx/ql4_mbx.c:470:66: warning: right shift by bigger than source value
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Ravi Anand <ravi.anand@qlogic.com>
Cc: David C Somayajulu <david.somayajulu@qlogic.com>
Cc: Karen Higgins <karen.higgins@qlogic.com>
Cc: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/scsi/qla4xxx/ql4_mbx.c

@@ -467,7 +467,7 @@ int qla4xxx_get_fwddb_entry(struct scsi_qla_host *ha,
 	if (conn_err_detail)
 		*conn_err_detail = mbox_sts[5];
 	if (tcp_source_port_num)
-		*tcp_source_port_num = (uint16_t) mbox_sts[6] >> 16;
+		*tcp_source_port_num = (uint16_t) (mbox_sts[6] >> 16);
 	if (connection_id)
 		*connection_id = (uint16_t) mbox_sts[6] & 0x00FF;
 	status = QLA_SUCCESS;