ALSA: hda - Add a proper ifdef to a debug code

Added a proper ifdef CONFIG_SND_DEBUG_VERBOSE to avoid a compile warning:
  sound/pci/hda/patch_intelhdmi.c:406: warning: ‘hdmi_get_channel_count’ defined but not used
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_intelhdmi.c

@@ -403,11 +403,13 @@ static void hdmi_stop_infoframe_trans(struct hda_codec *codec,
 						AC_DIPXMIT_DISABLE);
 }
 
+#ifdef CONFIG_SND_DEBUG_VERBOSE
 static int hdmi_get_channel_count(struct hda_codec *codec, hda_nid_t nid)
 {
 	return 1 + snd_hda_codec_read(codec, nid, 0,
 					AC_VERB_GET_CVT_CHAN_COUNT, 0);
 }
+#endif
 
 static void hdmi_set_channel_count(struct hda_codec *codec,
 				   hda_nid_t nid, int chs)