MAINTAINERS: update cros_ec_codec maintainers

Updates cros_ec_codec maintainers.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Acked-By: Cheng-Yi Chiang <cychiang@chromium.org>
Acked-By: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20220208031242.227563-1-tzungbi@google.com


Signed-off-by: Mark Brown <broonie@kernel.org>