dt-bindings: gpu: v3d: Add V3D driver maintainer as DT maintainer

dt-bindings: gpu: v3d: Add V3D driver maintainer as DT maintainer

As established in commit 89d04995f76c ("MAINTAINERS: Drop Emma Anholt
from all M lines."), Emma is no longer active in the Linux kernel and
dropped the V3D maintainership. Therefore, remove Emma as one of the DT
maintainers and add the current V3D driver maintainer.

Acked-by: Emma Anholt <emma@anholt.net>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250317-v3d-gpu-reset-fixes-v6-4-f3ee7717ed17@igalia.com