[SCSI] Revert "[SCSI] runtime resume parent for child's system-resume"

This reverts commit 28fd00d4.

With commit 88d26136 (PM: Prevent
runtime suspend during system resume), this patch is no longer needed.
Signed-off-by: NAaron Lu <aaron.lu@intel.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

drivers/scsi/scsi_pm.c

@@ -76,17 +76,8 @@ static int scsi_bus_resume_common(struct device *dev)
 {
 	int err = 0;
 
-	if (scsi_is_sdev_device(dev)) {
-		/*
-		 * Parent device may have runtime suspended as soon as
-		 * it is woken up during the system resume.
-		 *
-		 * Resume it on behalf of child.
-		 */
-		pm_runtime_get_sync(dev->parent);
+	if (scsi_is_sdev_device(dev))
 		err = scsi_dev_type_resume(dev);
-		pm_runtime_put_sync(dev->parent);
-	}
 
 	if (err == 0) {
 		pm_runtime_disable(dev);