ASoC: rt721-sdca: Fix issue of warning message

Fix issue of warning messages caused by some variables.

Signed-off-by: Jack Yu <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/rt-sdw-common.c

···
 int rt_sdca_btn_type(unsigned char *buffer)
 {
 	u8 btn_type = 0;
-	int ret;
+	int ret = 0;
 
 	btn_type |= buffer[0] & 0xf;
 	btn_type |= (buffer[0] >> 4) & 0xf;

sound/soc/codecs/rt721-sdca.c

···
 {
 	struct rt721_sdca_priv *rt721 =
 		container_of(work, struct rt721_sdca_priv, jack_detect_work.work);
-	int btn_type = 0, ret;
+	int btn_type = 0;
 
 	if (!rt721->hs_jack)
 		return;
···
 	if (rt721->scp_sdca_stat1 & SDW_SCP_SDCA_INT_SDCA_6) {
 		rt721->jack_type = rt_sdca_headset_detect(rt721->regmap,
 							RT721_SDCA_ENT_GE49);
-		if (ret < 0)
+		if (rt721->jack_type < 0)
 			return;
 	}