net/ixgbe: fix MAC control frame forward

[ upstream commit 7b053b8 ]

mac_ctrl_frame_fwd shouldn't be cleared when port stop,
otherwise it will be inconsistent with the actual status.
This patch fixes the issue.

Fixes: a524f55 ("net/ixgbe: fix flow control mode setting")

Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/ixgbe/ixgbe_ethdev.c

@@ -2966,8 +2966,6 @@ ixgbe_dev_stop(struct rte_eth_dev *dev)
 	tm_conf->committed = false;
 
 	adapter->rss_reta_updated = 0;
-
-	adapter->mac_ctrl_frame_fwd = 0;
 }
 
 /*