i40e: Add safety net for switch calling

This patch adds default case to handle unmatched switch calls.

Change-ID: Icd203570a1dc5322c1038f68b98a83195e8ad28c
Signed-off-by: NAkeem G Abodunrin <akeem.g.abodunrin@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

@@ -1413,6 +1413,8 @@ static void i40e_get_strings(struct net_device *netdev, u32 stringset,
 			data += ETH_GSTRING_LEN;
 		}
 		break;
+	default:
+		break;
 	}
 }
 
@@ -1654,6 +1656,8 @@ static int i40e_set_phys_id(struct net_device *netdev,
 	case ETHTOOL_ID_INACTIVE:
 		i40e_led_set(hw, pf->led_status, false);
 		break;
+	default:
+		break;
 	}
 
 	return 0;