sh_eth: kill useless initializers in sh_eth_{suspend|resume}()

sh_eth_{suspend|resume}() initialize their local variable 'ret' to 0 but
this value is never really used, thus we can kill those intializers...

Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/f09d7c64-4a2b-6973-09a4-10d759ed0df4@omp.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/renesas/sh_eth.c

@@ -3456,7 +3456,7 @@ static int sh_eth_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct sh_eth_private *mdp = netdev_priv(ndev);
-	int ret = 0;
+	int ret;
 
 	if (!netif_running(ndev))
 		return 0;
@@ -3475,7 +3475,7 @@ static int sh_eth_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct sh_eth_private *mdp = netdev_priv(ndev);
-	int ret = 0;
+	int ret;
 
 	if (!netif_running(ndev))
 		return 0;