MAINTAINERS: add the Freescale QMC controller entry

After contributing the driver, add myself as the maintainer
for the Freescale QMC controller.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20230217145645.1768659-8-herve.codina@bootlin.com


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