[ALSA] Fix compile errors with older gcc

Fixed compile errors with older gcc for initialization of a union.
sound/pci/ca0106/ca0106_mixer.c: At top level:
sound/pci/ca0106/ca0106_mixer.c:499: unknown field 'p' specified in initializer
sound/pci/ca0106/ca0106_mixer.c:499: warning: missing braces around initializer
sound/pci/ca0106/ca0106_mixer.c:499: warning: (near initialization for 'snd_ca0106_volume_ctls[0].tlv')

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 0f0ae68..ff24266 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -36,7 +36,7 @@
 	  .info = snd_hda_mixer_amp_volume_info, \
 	  .get = snd_hda_mixer_amp_volume_get, \
 	  .put = snd_hda_mixer_amp_volume_put, \
-	  .tlv.c = snd_hda_mixer_amp_tlv, \
+	  .tlv = { .c = snd_hda_mixer_amp_tlv },		\
 	  .private_value = HDA_COMPOSE_AMP_VAL(nid, channel, xindex, direction) }
 /* stereo volume with index */
 #define HDA_CODEC_VOLUME_IDX(xname, xcidx, nid, xindex, direction) \