dt-bindings: gpu: v3d: Add per-compatible register restrictions

dt-bindings: gpu: v3d: Add per-compatible register restrictions

In order to enforce per-SoC register rules, add per-compatible
restrictions. For example, V3D 3.3 (used in brcm,7268-v3d) has a cache
controller (GCA), which is not present in other V3D generations. Declaring
these differences helps ensure the DTB accurately reflect the hardware
design.

The example was using an incorrect order for the register names. This
commit corrects that by enforcing the order established in the register
items description.

Reviewed-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-v6-2-f3ee7717ed17@igalia.com