IB/mlx4: Set RLKEY bit for kernel QPs

Set RLKEY bit in the HW context for kernel QPs so that kernel QPs can
use the reserved L_Key for memory reference.

Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/mlx4/qp.c

@@ -1058,6 +1058,9 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
 	else
 		sqd_event = 0;
 
+	if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
+		context->rlkey |= (1 << 4);
+
 	/*
 	 * Before passing a kernel QP to the HW, make sure that the
 	 * ownership bits of the send queue are set and the SQ