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

This patch cleanups below cppcheck warning.

sound/soc/soc-core.c:2931:9: 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/87o8alyl67.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-core.c

@@ -2927,7 +2927,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
 	struct device_node *np = card->dev->of_node;
 	int num_routes;
 	struct snd_soc_dapm_route *routes;
-	int i, ret;
+	int i;
 
 	num_routes = of_property_count_strings(np, propname);
 	if (num_routes < 0 || num_routes & 1) {
@@ -2947,7 +2947,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
 	}
 
 	for (i = 0; i < num_routes; i++) {
-		ret = of_property_read_string_index(np, propname,
+		int ret = of_property_read_string_index(np, propname,
 							2 * i, &routes[i].sink);
 		if (ret) {
 			dev_err(card->dev,