rocker: fix a sleeping in atomic bug

This code is holding the &ofdpa->flow_tbl_lock spinlock so it is not
allowed to sleep.  That means we have to pass the OFDPA_OP_FLAG_NOWAIT
flag to ofdpa_flow_tbl_del().

Fixes: 936bd48 ("rocker: use FIB notifications instead of switchdev calls")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Dan Carpenter

drivers/net/ethernet/rocker/rocker_ofdpa.c

@@ -2783,7 +2783,8 @@ static void ofdpa_fib4_abort(struct rocker *rocker)
 		if (!ofdpa_port)
 			continue;
 		nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
-		ofdpa_flow_tbl_del(ofdpa_port, OFDPA_OP_FLAG_REMOVE,
+		ofdpa_flow_tbl_del(ofdpa_port,
+				   OFDPA_OP_FLAG_REMOVE | OFDPA_OP_FLAG_NOWAIT,
 				   flow_entry);
 	}
 	spin_unlock_irqrestore(&ofdpa->flow_tbl_lock, flags);