ASoC: soc-dapm: cleanup cppcheck warning at dapm_wcache_lookup()

This patch cleanups below cppcheck warning.

sound/soc/soc-dapm.c:653:20: style: The scope of the variable 'wlist' can be reduced. [variableScope]
 struct list_head *wlist;
                   ^
sound/soc/soc-dapm.c:655:6: style: The scope of the variable 'i' can be reduced. [variableScope]
 int i = 0;
     ^
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87y29gu25d.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-dapm.c

@@ -650,12 +650,11 @@ static struct snd_soc_dapm_widget *
 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
 {
 	struct snd_soc_dapm_widget *w = wcache->widget;
-	struct list_head *wlist;
-	const int depth = 2;
-	int i = 0;
 
 	if (w) {
-		wlist = &w->dapm->card->widgets;
+		struct list_head *wlist = &w->dapm->card->widgets;
+		const int depth = 2;
+		int i = 0;
 
 		list_for_each_entry_from(w, wlist, list) {
 			if (!strcmp(name, w->name))