MAINTAINERS: Add entry for Loongson ASoC driver

Add MAINTAINERS entry for Loongson I2S ASoC drivers to track
changes in sound/soc/loongson/ directory.

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Link: https://patch.msgid.link/9451dfcd6ff3048eac0656d3720908386128b7fc.1780304703.git.zhoubinbin@loongson.cn
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: AaronDot

MAINTAINERS

@@ -15051,6 +15051,15 @@ F:	arch/loongarch/
 F:	drivers/*/*loongarch*
 F:	drivers/cpufreq/loongson3_cpufreq.c
 
+LOONGSON AUDIO (ASoC) DRIVERS
+M:	Binbin Zhou <zhoubinbin@loongson.cn>
+L:	linux-sound@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/sound/loongson,ls-audio-card.yaml
+F:	Documentation/devicetree/bindings/sound/loongson,ls2k1000-i2s.yaml
+F:	sound/soc/loongson/loongson_*.c
+F:	sound/soc/loongson/loongson_*.h
+
 LOONGSON GPIO DRIVER
 M:	Yinbo Zhu <zhuyinbo@loongson.cn>
 L:	linux-gpio@vger.kernel.org