dt-bindings: gpu: v3d: Add SMS register to BCM2712 compatible

dt-bindings: gpu: v3d: Add SMS register to BCM2712 compatible

V3D 7.1 exposes a new register block, called V3D_SMS. As BCM2712 has a
V3D 7.1 core, add a new register item to its compatible. Similar to the
GCA, which is specific for V3D 3.3, SMS should only be added for V3D 7.1
variants (such as brcm,2712-v3d).

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250317-v3d-gpu-reset-fixes-v6-3-f3ee7717ed17@igalia.com