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

This patch cleanups below cppcheck warning.

sound/soc/soc-topology.c:1038:31: style: The scope of the variable 'control_hdr' can be reduced. [variableScope]
 struct snd_soc_tplg_ctl_hdr *control_hdr;
                              ^
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87o8agwfkv.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-topology.c

@@ -1035,7 +1035,6 @@ static int soc_tplg_denum_create(struct soc_tplg *tplg, unsigned int count,
 static int soc_tplg_kcontrol_elems_load(struct soc_tplg *tplg,
 	struct snd_soc_tplg_hdr *hdr)
 {
-	struct snd_soc_tplg_ctl_hdr *control_hdr;
 	int ret;
 	int i;
 
@@ -1043,8 +1042,7 @@ static int soc_tplg_kcontrol_elems_load(struct soc_tplg *tplg,
 		soc_tplg_get_offset(tplg));
 
 	for (i = 0; i < le32_to_cpu(hdr->count); i++) {
-
-		control_hdr = (struct snd_soc_tplg_ctl_hdr *)tplg->pos;
+		struct snd_soc_tplg_ctl_hdr *control_hdr = (struct snd_soc_tplg_ctl_hdr *)tplg->pos;
 
 		if (le32_to_cpu(control_hdr->size) != sizeof(*control_hdr)) {
 			dev_err(tplg->dev, "ASoC: invalid control size\n");