ALSA: hda - Fix invalid amp value for STAC925x

The value set in the commit 2465fb66
is actually wrong.  The value range is from 0 to 0x1f while the patch
sets to 0x7f.  Let's fix it.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -886,7 +886,7 @@ static struct hda_verb stac925x_core_init[] = {
 	/* set dac0mux for dac converter */
 	{ 0x06, AC_VERB_SET_CONNECT_SEL, 0x00},
 	/* unmute and set max the selector */
-	{ 0x0e, AC_VERB_SET_AMP_GAIN_MUTE, 0xb07f },
+	{ 0x0e, AC_VERB_SET_AMP_GAIN_MUTE, 0xb01f },
 	{}
 };