drivers: net: cpsw: remove pm runtime calls from suspend callbacks

BugLink: http://bugs.launchpad.net/bugs/1625177

PM runtime is properly handled in cpsw_ndo_open/stop(), as result it
isn't required to duplicate these calls in .suspend()/.resume()
callbacks. Moreover, it might cause unnecessary RPM resume of CPSW
during System suspend in the case it's already suspended because
all ethX interfaces are down already, before System suspend started.
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 74556f51)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/net/ethernet/ti/cpsw.c

@@ -2576,8 +2576,6 @@ static int cpsw_suspend(struct device *dev)
 			cpsw_ndo_stop(ndev);
 	}
 
-	pm_runtime_put_sync(&pdev->dev);
-
 	/* Select sleep pin state */
 	pinctrl_pm_select_sleep_state(&pdev->dev);
 
@@ -2590,8 +2588,6 @@ static int cpsw_resume(struct device *dev)
 	struct net_device	*ndev = platform_get_drvdata(pdev);
 	struct cpsw_priv	*priv = netdev_priv(ndev);
 
-	pm_runtime_get_sync(&pdev->dev);
-
 	/* Select default pin state */
 	pinctrl_pm_select_default_state(&pdev->dev);