MAINTAINERS: add atmel audio alsa driver maintainer entry

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

diff --git a/MAINTAINERS b/MAINTAINERS
index aefa948..0231427 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1659,6 +1659,12 @@
 S:	Supported
 F:	drivers/tty/serial/atmel_serial.c
 
+ATMEL Audio ALSA driver
+M:	Bo Shen <voice.shen@atmel.com>
+L:	alsa-devel@alsa-project.org (moderated for non-subscribers)
+S:	Supported
+F:	sound/soc/atmel
+
 ATMEL DMA DRIVER
 M:	Nicolas Ferre <nicolas.ferre@atmel.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)