ALSA: hda - Fix the logic to detect VIA analog low-current mode

The analog low-current mode must be enabled when the no stream is
running but the current detection checks it in a wrong way.

Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=741128

Cc: <stable@kernel.org> [v3.1+]
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_via.c

@@ -1051,7 +1051,7 @@ static void analog_low_current_mode(struct hda_codec *codec)
 	bool enable;
 	unsigned int verb, parm;
 
-	enable = is_aa_path_mute(codec) && (spec->opened_streams != 0);
+	enable = is_aa_path_mute(codec) && !spec->opened_streams;
 
 	/* decide low current mode's verb & parameter */
 	switch (spec->codec_type) {