ASoC: soc-core: cleanup cppcheck warning at snd_soc_unregister_component()

This patch cleanups below cppcheck warning.

sound/soc/soc-core.c:2719:28: style: The scope of the variable 'component' can be reduced. [variableScope]
 struct snd_soc_component *component;
                           ^

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87sfzxyl6k.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-core.c

@@ -2717,11 +2717,10 @@ EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
  */
 void snd_soc_unregister_component(struct device *dev)
 {
-	struct snd_soc_component *component;
-
 	mutex_lock(&client_mutex);
 	while (1) {
-		component = snd_soc_lookup_component_nolocked(dev, NULL);
+		struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
+
 		if (!component)
 			break;