[ALSA] hda-codec - Fix compile warnings without CONFIG_SND_DEBUG

Fix compile warnings (unused variables) in patch_conexant.c
without CONFIG_SND_DEBUG.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/hda/patch_conexant.c

@@ -397,6 +397,9 @@ static int conexant_eapd_put(struct snd_kcontrol *kcontrol,
 	return 1;
 }
 
+/* controls for test mode */
+#ifdef CONFIG_SND_DEBUG
+
 static int conexant_ch_mode_info(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_info *uinfo)
 {
@@ -545,6 +548,8 @@ static int cxt_spdif_ctrl_put(struct snd_kcontrol *kcontrol,
 	  .put = cxt_spdif_ctrl_put, \
 	  .private_value = nid | (mask<<16) }
 
+#endif /* CONFIG_SND_DEBUG */
+
 /* Conexant 5045 specific */
 
 static hda_nid_t cxt5045_dac_nids[1] = { 0x19 };