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.com


Signed-off-by: Mark Brown <broonie@kernel.org>