ASoC: soc-dai: cleanup cppcheck warning at snd_soc_dai_link_set_capabilities()

This patch cleanups below cppcheck warning.

sound/soc/soc-dai.c:454:7: style: The scope of the variable 'supported_cpu' can be reduced. [variableScope]
 bool supported_cpu;
      ^
sound/soc/soc-dai.c:455:7: style: The scope of the variable 'supported_codec' can be reduced. [variableScope]
 bool supported_codec;
      ^
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87y292yom6.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-dai.c

@@ -492,18 +492,16 @@ bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int dir)
  */
 void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link)
 {
-	struct snd_soc_dai_link_component *cpu;
-	struct snd_soc_dai_link_component *codec;
-	struct snd_soc_dai *dai;
 	bool supported[SNDRV_PCM_STREAM_LAST + 1];
-	bool supported_cpu;
-	bool supported_codec;
 	int direction;
-	int i;
 
 	for_each_pcm_streams(direction) {
-		supported_cpu = false;
-		supported_codec = false;
+		struct snd_soc_dai_link_component *cpu;
+		struct snd_soc_dai_link_component *codec;
+		struct snd_soc_dai *dai;
+		bool supported_cpu = false;
+		bool supported_codec = false;
+		int i;
 
 		for_each_link_cpus(dai_link, i, cpu) {
 			dai = snd_soc_find_dai_with_mutex(cpu);