soc/fsl/qbman: Fix drain_mr_fqni()

The drain_mr_fqni() function may be called fron uninterruptable
context so convert the msleep() to an mdelay().  Also ensure that
the valid bit is updated while polling.
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

drivers/soc/fsl/qbman/qman.c

@@ -1164,6 +1164,7 @@ static int drain_mr_fqrni(struct qm_portal *p)
 {
 	const union qm_mr_entry *msg;
 loop:
+	qm_mr_pvb_update(p);
 	msg = qm_mr_current(p);
 	if (!msg) {
 		/*
@@ -1180,7 +1181,8 @@ static int drain_mr_fqrni(struct qm_portal *p)
 		 * entries well before the ring has been fully consumed, so
 		 * we're being *really* paranoid here.
 		 */
-		msleep(1);
+		mdelay(1);
+		qm_mr_pvb_update(p);
 		msg = qm_mr_current(p);
 		if (!msg)
 			return 0;