sfc: Minor formatting cleanup

Fix some indentation and line continuations.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index a096e28..94d0365 100644
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -339,7 +339,7 @@
  * OS to free the skb.
  */
 netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb,
-				      struct net_device *net_dev)
+				struct net_device *net_dev)
 {
 	struct efx_nic *efx = netdev_priv(net_dev);
 	struct efx_tx_queue *tx_queue;