MAINTAINERS: fix nonexistent dtbinding file name

MAINTAINERS: fix nonexistent dtbinding file name

The blamed commit converted the fsl,qoriq-mc.txt into fsl,qoriq-mc.yaml
but forgot to also update the MAINTAINERS file to reference the new
filename.

Fix this by using the corrent filename - fsl,qoriq-mc.yaml.

Fixes: bfb921b2a9d5 ("dt-bindings: misc: fsl,qoriq-mc: convert to yaml format")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20250320120319.3520315-3-ioana.ciornei@nxp.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>