drivers/ide/pci/sc1200.c: fix suspend/resume buglets and warnings

* We shouldn't bother with dev->current_state, the PCI API functions we
  call manage this for us (and do a far better job at it too).

* Remove pci_set_power_state(dev, PCI_D0) call in resume, as
  pci_enable_device() does the same thing.

* Check pci_enable_device() return value.  If it failed, fail
  the entire resume and avoid programming timings into the [potentially
  dead/asleep] chip.
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/pci/sc1200.c

@@ -324,17 +324,18 @@ static int sc1200_suspend (struct pci_dev *dev, pm_message_t state)
 
 	pci_disable_device(dev);
 	pci_set_power_state(dev, pci_choose_state(dev, state));
-	dev->current_state = state.event;
 	return 0;
 }
 
 static int sc1200_resume (struct pci_dev *dev)
 {
 	ide_hwif_t	*hwif = NULL;
+	int		i;
+
+	i = pci_enable_device(dev);
+	if (i)
+		return i;
 
-	pci_set_power_state(dev, PCI_D0);	// bring chip back from sleep state
-	dev->current_state = PM_EVENT_ON;
-	pci_enable_device(dev);
 	//
 	// loop over all interfaces that are part of this pci device:
 	//