ASoC: MAINTAINERS: Add maintainer for TI LM49453 Audio codec driver

I will be supporting the TI LM49453 audio driver and also a few new TI codec
drivers, that are currently in development and will be upstreamed shortly.

Signed-off-by: M R Swami Reddy <mr.swami.reddy@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>