ice: Explicitly return 0

Previous checks, and goto, will catch all errors meaning these returns
will only return 0; explicitly return 0 for these cases.
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)

drivers/net/ethernet/intel/ice/ice_dcb_lib.c

@@ -859,7 +859,7 @@ int ice_init_pf_dcb(struct ice_pf *pf, bool locked)
 	if (err)
 		goto dcb_init_err;
 
-	return err;
+	return 0;
 
 dcb_init_err:
 	dev_err(dev, "DCB init failed\n");

drivers/net/ethernet/intel/ice/ice_ethtool.c

@@ -664,7 +664,7 @@ static int ice_lbtest_prepare_rings(struct ice_vsi *vsi)
 	if (status)
 		goto err_start_rx_ring;
 
-	return status;
+	return 0;
 
 err_start_rx_ring:
 	ice_vsi_free_rx_rings(vsi);