ASoC: meson: axg-tdmin: remove useless assignment

cppcheck complains about potential null pointer dereference but it's
rather an unnecessary assignment to NULL before walking through a
list.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210326215927.936377-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/meson/axg-tdmin.c

@@ -57,7 +57,7 @@ static const struct snd_kcontrol_new axg_tdmin_in_mux =
 static struct snd_soc_dai *
 axg_tdmin_get_be(struct snd_soc_dapm_widget *w)
 {
-	struct snd_soc_dapm_path *p = NULL;
+	struct snd_soc_dapm_path *p;
 	struct snd_soc_dai *be;
 
 	snd_soc_dapm_widget_for_each_source_path(w, p) {