[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/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index 1e44714..4e0f954 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -794,7 +794,7 @@
 	.info = snd_p16v_volume_info, \
 	.get = snd_p16v_volume_get, \
 	.put = snd_p16v_volume_put, \
-	.tlv.p = snd_p16v_db_scale1, \
+	.tlv = { .p = snd_p16v_db_scale1 },	\
 	.private_value = ((xreg) | ((xhl) << 8)) \
 }