igc: Remove redundant runtime resume for ethtool ops

8c5ad0da ("igc: Add ethtool support") added ethtool_ops.begin() and
.complete(), which used pm_runtime_get_sync() to resume suspended devices
before any ethtool_ops callback and allow suspend after it completed.

Subsequently, f32a2137 ("ethtool: runtime-resume netdev parent before
ethtool ioctl ops") added pm_runtime_get_sync() in the dev_ethtool() path,
so the device is resumed before any ethtool_ops callback even if the driver
didn't supply a .begin() callback.

Remove the .begin() and .complete() callbacks, which are now redundant
because dev_ethtool() already resumes the device.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/igc/igc_ethtool.c

@@ -1711,21 +1711,6 @@ static int igc_ethtool_set_eee(struct net_device *netdev,
 	return 0;
 }
 
-static int igc_ethtool_begin(struct net_device *netdev)
-{
-	struct igc_adapter *adapter = netdev_priv(netdev);
-
-	pm_runtime_get_sync(&adapter->pdev->dev);
-	return 0;
-}
-
-static void igc_ethtool_complete(struct net_device *netdev)
-{
-	struct igc_adapter *adapter = netdev_priv(netdev);
-
-	pm_runtime_put(&adapter->pdev->dev);
-}
-
 static int igc_ethtool_get_link_ksettings(struct net_device *netdev,
 					  struct ethtool_link_ksettings *cmd)
 {
@@ -2025,8 +2010,6 @@ static const struct ethtool_ops igc_ethtool_ops = {
 	.set_priv_flags		= igc_ethtool_set_priv_flags,
 	.get_eee		= igc_ethtool_get_eee,
 	.set_eee		= igc_ethtool_set_eee,
-	.begin			= igc_ethtool_begin,
-	.complete		= igc_ethtool_complete,
 	.get_link_ksettings	= igc_ethtool_get_link_ksettings,
 	.set_link_ksettings	= igc_ethtool_set_link_ksettings,
 	.self_test		= igc_ethtool_diag_test,