ALSA: hda: 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/hda/hda_intel.c

@@ -795,7 +795,6 @@ static int param_set_xint(const char *val, const struct kernel_param *kp)
  */
 static int azx_suspend(struct device *dev)
 {
-	struct pci_dev *pci = to_pci_dev(dev);
 	struct snd_card *card = dev_get_drvdata(dev);
 	struct azx *chip;
 	struct hda_intel *hda;
@@ -824,9 +823,6 @@ static int azx_suspend(struct device *dev)
 
 	if (chip->msi)
 		pci_disable_msi(chip->pci);
-	pci_disable_device(pci);
-	pci_save_state(pci);
-	pci_set_power_state(pci, PCI_D3hot);
 	if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL)
 		hda_display_power(false);
 	return 0;
@@ -851,15 +847,6 @@ static int azx_resume(struct device *dev)
 		hda_display_power(true);
 		haswell_set_bclk(chip);
 	}
-	pci_set_power_state(pci, PCI_D0);
-	pci_restore_state(pci);
-	if (pci_enable_device(pci) < 0) {
-		dev_err(chip->card->dev,
-			"pci_enable_device failed, disabling device\n");
-		snd_card_disconnect(card);
-		return -EIO;
-	}
-	pci_set_master(pci);
 	if (chip->msi)
 		if (pci_enable_msi(pci) < 0)
 			chip->msi = 0;