ASoC: topology: Do not assign fields that are already set

The routes are allocated with kzalloc(), so all fields are zeroed by
default, skip unnecessary assignments.
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20240603102818.36165-4-amadeuszx.slawinski@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-topology.c

@@ -1072,11 +1072,7 @@ static int soc_tplg_dapm_graph_elems_load(struct soc_tplg *tplg,
 			break;
 		}
 
-		/* set to NULL atm for tplg users */
-		route->connected = NULL;
-		if (strnlen(elem->control, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) == 0) {
-			route->control = NULL;
-		} else {
+		if (strnlen(elem->control, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) != 0) {
 			route->control = devm_kmemdup(tplg->dev, elem->control,
 						      min(strlen(elem->control),
 							  SNDRV_CTL_ELEM_ID_NAME_MAXLEN),