net: ena: ethtool: clean up minor indentation issue

There is a statement that is indented incorrectly, remove a space.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/amazon/ena/ena_ethtool.c

@@ -221,7 +221,7 @@ static void ena_queue_strings(struct ena_adapter *adapter, u8 **data)
 
 			snprintf(*data, ETH_GSTRING_LEN,
 				 "queue_%u_tx_%s", i, ena_stats->name);
-			 (*data) += ETH_GSTRING_LEN;
+			(*data) += ETH_GSTRING_LEN;
 		}
 		/* Rx stats */
 		for (j = 0; j < ENA_STATS_ARRAY_RX; j++) {