sfc: don't fail probe if MAE/TC setup fails

Existing comment in the source explains why we don't want efx_init_tc()
 failure to be fatal.  Cited commit erroneously consolidated failure
 paths causing the probe to be failed in this case.

Fixes: 7e056e23 ("sfc: obtain device mac address based on firmware handle for ef100")
Reviewed-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/aa7f589dd6028bd1ad49f0a85f37ab33c09b2b45.1692114888.git.ecree.xilinx@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/sfc/ef100_nic.c

@@ -1194,7 +1194,7 @@ int ef100_probe_netdev_pf(struct efx_nic *efx)
 		net_dev->features |= NETIF_F_HW_TC;
 		efx->fixed_features |= NETIF_F_HW_TC;
 	}
-	return rc;
+	return 0;
 }
 
 int ef100_probe_vf(struct efx_nic *efx)