ASoC: rt5514: make array rt5514_dai static

The array rt5514_dai is local to the source and does not need to be in
global scope, so make it static.

Cleans up sparse warnings:
symbol 'rt5514_dai' was not declared. Should it be static?

warning: symbol 'rt5514_dai' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5514.c

@@ -1066,7 +1066,7 @@ static const struct snd_soc_dai_ops rt5514_aif_dai_ops = {
 	.set_tdm_slot = rt5514_set_tdm_slot,
 };
 
-struct snd_soc_dai_driver rt5514_dai[] = {
+static struct snd_soc_dai_driver rt5514_dai[] = {
 	{
 		.name = "rt5514-aif1",
 		.id = 0,