ASoC: uniphier: Handle regmap_write errors in aio_iecout_set_enable()

The aio_oport_set_stream_type() function did not previously check the
return values of regmap_write().
If these functions fail, it could lead to silent failures when
configuring the audio playback port, causing improper behavior in audio
stream output via S/PDIF without any indication of an error.

This patch modifies aio_oport_set_stream_type() to check the return
values of regmap_write().
If regmap_write() fails, the error code is propagated back to the caller
to ensure proper error handling.

Signed-off-by: Ingyu Jang <ingyujang25@unist.ac.kr>
Link: https://patch.msgid.link/SE1P216MB2287962B462AE91B26248D19FD7E2@SE1P216MB2287.KORP216.PROD.OUTLOOK.COM
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: jgyu25

sound/soc/uniphier/aio-core.c

@@ -838,6 +838,7 @@ int aio_oport_set_stream_type(struct uniphier_aio_sub *sub,
 {
 	struct regmap *r = sub->aio->chip->regmap;
 	u32 repet = 0, pause = OPORTMXPAUDAT_PAUSEPC_CMN;
+	int ret;
 
 	switch (pc) {
 	case IEC61937_PC_AC3:
@@ -880,8 +881,13 @@ int aio_oport_set_stream_type(struct uniphier_aio_sub *sub,
 		break;
 	}
 
-	regmap_write(r, OPORTMXREPET(sub->swm->oport.map), repet);
-	regmap_write(r, OPORTMXPAUDAT(sub->swm->oport.map), pause);
+	ret = regmap_write(r, OPORTMXREPET(sub->swm->oport.map), repet);
+	if (ret)
+		return ret;
+	
+	ret = regmap_write(r, OPORTMXPAUDAT(sub->swm->oport.map), pause);
+	if (ret)
+		return ret;
 
 	return 0;
 }