cxgb4: depend on firmware event for link status

Depend on the firmware sending us link status changes,
rather than assuming that the link goes down upon L1
configuration.
Signed-off-by: NCasey Leedom <leedom@chelsio.com>
Signed-off-by: NGanesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/t4_hw.c

@@ -4066,8 +4066,6 @@ int t4_link_l1cfg(struct adapter *adapter, unsigned int mbox,
 	unsigned int fw_mdi = FW_PORT_CAP32_MDI_V(FW_PORT_CAP32_MDI_AUTO);
 	fw_port_cap32_t fw_fc, cc_fec, fw_fec, rcap;
 
-	lc->link_ok = 0;
-
 	/* Convert driver coding of Pause Frame Flow Control settings into the
 	 * Firmware's API.
 	 */