ASoC: soc-topology: cleanup cppcheck warning at soc_tplg_dai_elems_load()

ASoC: soc-topology: cleanup cppcheck warning at soc_tplg_dai_elems_load()

This patch cleanups below cppcheck warning.

sound/soc/soc-topology.c:2350:27: style: The scope of the variable 'dai' can be reduced. [variableScope]
 struct snd_soc_tplg_dai *dai;
                          ^
sound/soc/soc-topology.c:2352:9: style: The scope of the variable 'ret' can be reduced. [variableScope]
 int i, ret;
        ^

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87r1fcwflh.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>