MAINTAINERS: add the Renesas IDT821034 codec entry

After contributing the driver, add myself as the maintainer for the
Renesas IDT821034 codec.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/r/20230126085137.375814-4-herve.codina@bootlin.comSigned-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -17783,6 +17783,13 @@ F:	Documentation/devicetree/bindings/net/renesas,*.yaml
 F:	drivers/net/ethernet/renesas/
 F:	include/linux/sh_eth.h
 
+RENESAS IDT821034 ASoC CODEC
+M:	Herve Codina <herve.codina@bootlin.com>
+L:	alsa-devel@alsa-project.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/sound/renesas,idt821034.yaml
+F:	sound/soc/codecs/idt821034.c
+
 RENESAS R-CAR GYROADC DRIVER
 M:	Marek Vasut <marek.vasut@gmail.com>
 L:	linux-iio@vger.kernel.org