asoc: use ASoC API to set driver component name prefix

during devm_snd_soc_register_card(), the name_prefix can be set
if "sound-name-prefix" is provided in the DT nodes.

The original approach to set prefix would possibly cause ASoC
component probe failed if prefix has not set before probe is called

Change-Id: Ie78d042cda24b7d1d926223d476786e13d965ac7
Signed-off-by: Junkai Cai <quic_junkai@quicinc.com>

asoc/codecs/wsa884x/internal.h

@@ -165,7 +165,6 @@ struct wsa884x_priv {
 	int num_supplies;
 	struct regulator_bulk_data *supplies;
 	unsigned long status_mask;
-	char *wsa884x_name_prefix;
 	struct snd_soc_dai_driver *dai_driver;
 	struct snd_soc_component_driver *driver;
 };