sfc: Fix some formatting errors reported by checkpatch

Fix the following errors and warnings:

ERROR: trailing whitespace
ERROR: spaces required around that '=' (ctx:VxV)
WARNING: please, no space before tabs

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
diff --git a/drivers/net/ethernet/sfc/mcdi_phy.c b/drivers/net/ethernet/sfc/mcdi_phy.c
index 6c63ab0..3077bf1 100644
--- a/drivers/net/ethernet/sfc/mcdi_phy.c
+++ b/drivers/net/ethernet/sfc/mcdi_phy.c
@@ -741,7 +741,7 @@
 
 const struct efx_phy_operations efx_mcdi_phy_ops = {
 	.probe		= efx_mcdi_phy_probe,
-	.init 	 	= efx_port_dummy_op_int,
+	.init		= efx_port_dummy_op_int,
 	.reconfigure	= efx_mcdi_phy_reconfigure,
 	.poll		= efx_mcdi_phy_poll,
 	.fini		= efx_port_dummy_op_void,