ALSA: rme96: 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/rme96.c

@@ -2358,7 +2358,6 @@ snd_rme96_create_switches(struct snd_card *card,
 
 static int rme96_suspend(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct rme96 *rme96 = card->private_data;
 
@@ -2381,26 +2380,14 @@ static int rme96_suspend(struct device *dev)
 	/* disable the DAC  */
 	rme96->areg &= ~RME96_AR_DAC_EN;
 	writel(rme96->areg, rme96->iobase + RME96_IO_ADDITIONAL_REG);
-
-	pci_disable_device(pci);
-	pci_save_state(pci);
-
 	return 0;
 }
 
 static int rme96_resume(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct rme96 *rme96 = card->private_data;
 
-	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;
-	}
-
 	/* reset playback and record buffer pointers */
 	writel(0, rme96->iobase + RME96_IO_SET_PLAY_POS
 		  + rme96->playback_pointer);