ALSA: hda/via - Add missing stream_pm ops setup

Similar like the case for Realtek, VIA codec driver needs this ops as
well for making the widget power-save working.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_via.c

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index 742087e..31a95cc 100644
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -472,6 +472,7 @@
 	.init = via_init,
 	.free = via_free,
 	.unsol_event = snd_hda_jack_unsol_event,
+	.stream_pm = snd_hda_gen_stream_pm,
 #ifdef CONFIG_PM
 	.suspend = via_suspend,
 	.check_power_status = via_check_power_status,