ASoC: soc-pcm: cleanup cppcheck warning at soc_pcm_components_close()

This patch cleanups below cppcheck warning.

sound/soc/soc-pcm.c:631:9: style: The scope of the variable 'r' can be reduced. [variableScope]
 int i, r, ret = 0;
        ^
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87sg00zf2l.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-pcm.c

@@ -633,10 +633,10 @@ static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_component *component;
-	int i, r, ret = 0;
+	int i, ret = 0;
 
 	for_each_rtd_components(rtd, i, component) {
-		r = snd_soc_component_close(component, substream, rollback);
+		int r = snd_soc_component_close(component, substream, rollback);
 		if (r < 0)
 			ret = r; /* use last ret */