net/ngbe: fix link speed check

[ upstream commit bf1bc99 ]

Since the bit of ETH_LINK_SPEED_FIXED was set for the force link
speed, it conflicts with '~allowed_speeds'.

Fixes: 3518df5 ("net/ngbe: support device start/stop")

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>

drivers/net/ngbe/ngbe_ethdev.c

@@ -1041,7 +1041,7 @@ ngbe_dev_start(struct rte_eth_dev *dev)
 	if (hw->mac.default_speeds & NGBE_LINK_SPEED_10M_FULL)
 		allowed_speeds |= RTE_ETH_LINK_SPEED_10M;
 
-	if (*link_speeds & ~allowed_speeds) {
+	if (((*link_speeds) >> 1) & ~(allowed_speeds >> 1)) {
 		PMD_INIT_LOG(ERR, "Invalid link setting");
 		goto error;
 	}