ALSA: ali5451: Simplify PM callbacks

This is a similar cleanup like the commit [3db084fd0af5: ALSA: fm801:
PCI core handles power state for us].

Since pci_set_power_state(), pci_save_state() and pci_restore_state()
are already done in the PCI core side, so we don't need to it doubly.

Also, pci_enable_device(), pci_disable_device() and pci_set_master()
calls in PM callbacks are superfluous nowadays, too, so get rid of
them as well.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ali5451/ali5451.c

@@ -1873,7 +1873,6 @@ static int snd_ali_mixer(struct snd_ali *codec)
 #ifdef CONFIG_PM_SLEEP
 static int ali_suspend(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct snd_ali *chip = card->private_data;
 	struct snd_ali_image *im;
@@ -1914,16 +1913,11 @@ static int ali_suspend(struct device *dev)
 	outl(0xffffffff, ALI_REG(chip, ALI_STOP));
 
 	spin_unlock_irq(&chip->reg_lock);
-
-	pci_disable_device(pci);
-	pci_save_state(pci);
-	pci_set_power_state(pci, PCI_D3hot);
 	return 0;
 }
 
 static int ali_resume(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct snd_ali *chip = card->private_data;
 	struct snd_ali_image *im;
@@ -1933,15 +1927,6 @@ static int ali_resume(struct device *dev)
 	if (!im)
 		return 0;
 
-	pci_set_power_state(pci, PCI_D0);
-	pci_restore_state(pci);
-	if (pci_enable_device(pci) < 0) {
-		dev_err(dev, "pci_enable_device failed, disabling device\n");
-		snd_card_disconnect(card);
-		return -EIO;
-	}
-	pci_set_master(pci);
-
 	spin_lock_irq(&chip->reg_lock);
 	
 	for (i = 0; i < ALI_CHANNELS; i++) {