ALSA: Convert to new pm_ops for PCI drivers

Straightforward conversion to the new pm_ops from the legacy
suspend/resume ops.

Since we change vx222, vx_core and vxpocket have to be converted,
too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h
index f53897a..7112a89 100644
--- a/sound/pci/oxygen/oxygen.h
+++ b/sound/pci/oxygen/oxygen.h
@@ -162,8 +162,7 @@
 		    );
 void oxygen_pci_remove(struct pci_dev *pci);
 #ifdef CONFIG_PM
-int oxygen_pci_suspend(struct pci_dev *pci, pm_message_t state);
-int oxygen_pci_resume(struct pci_dev *pci);
+extern const struct dev_pm_ops oxygen_pci_pm;
 #endif
 void oxygen_pci_shutdown(struct pci_dev *pci);