[ALSA] Various fixes for suspend/resume of ALSA PCI drivers

- Check the return value of pci_enable_device() and request_irq()
  in the suspend.  If any error occurs there, disable the device
  using snd_card_disconnect().
- Call pci_set_power_state() properly with pci_choose_state().
- Fix the order to call pci_set_power_state().
- Removed obsolete house-made PM codes in some drivers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/ens1370.c

@@ -2072,9 +2072,10 @@ static int snd_ensoniq_suspend(struct pci_dev *pci, pm_message_t state)
 	udelay(100);
 	snd_ak4531_suspend(ensoniq->u.es1370.ak4531);
 #endif	
-	pci_set_power_state(pci, PCI_D3hot);
+
 	pci_disable_device(pci);
 	pci_save_state(pci);
+	pci_set_power_state(pci, pci_choose_state(pci, state));
 	return 0;
 }
 
@@ -2083,9 +2084,14 @@ static int snd_ensoniq_resume(struct pci_dev *pci)
 	struct snd_card *card = pci_get_drvdata(pci);
 	struct ensoniq *ensoniq = card->private_data;
 
-	pci_restore_state(pci);
-	pci_enable_device(pci);
 	pci_set_power_state(pci, PCI_D0);
+	pci_restore_state(pci);
+	if (pci_enable_device(pci) < 0) {
+		printk(KERN_ERR DRIVER_NAME ": pci_enable_device failed, "
+		       "disabling device\n");
+		snd_card_disconnect(card);
+		return -EIO;
+	}
 	pci_set_master(pci);
 
 	snd_ensoniq_chip_init(ensoniq);