fm10k: warn if the stat size is unknown

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c

@@ -248,6 +248,8 @@ static void __fm10k_add_ethtool_stats(u64 **data, void *pointer,
 			*((*data)++) = *(u8 *)p;
 			break;
 		default:
+			WARN_ONCE(1, "unexpected stat size for %s",
+				  stats[i].stat_string);
 			*((*data)++) = 0;
 		}
 	}