ALSA: riptide: 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/riptide/riptide.c

@@ -1153,7 +1153,6 @@ static void riptide_handleirq(unsigned long dev_id)
 #ifdef CONFIG_PM_SLEEP
 static int riptide_suspend(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct snd_riptide *chip = card->private_data;
 
@@ -1161,27 +1160,14 @@ static int riptide_suspend(struct device *dev)
 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 	snd_pcm_suspend_all(chip->pcm);
 	snd_ac97_suspend(chip->ac97);
-	pci_disable_device(pci);
-	pci_save_state(pci);
-	pci_set_power_state(pci, PCI_D3hot);
 	return 0;
 }
 
 static int riptide_resume(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct snd_riptide *chip = card->private_data;
 
-	pci_set_power_state(pci, PCI_D0);
-	pci_restore_state(pci);
-	if (pci_enable_device(pci) < 0) {
-		printk(KERN_ERR "riptide: pci_enable_device failed, "
-		       "disabling device\n");
-		snd_card_disconnect(card);
-		return -EIO;
-	}
-	pci_set_master(pci);
 	snd_riptide_initialize(chip);
 	snd_ac97_resume(chip->ac97);
 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);