drm/panfrost: Add mediatek,mt8192-mali compatible

Required for Mali-G57 on the Mediatek MT8192 and MT8195, which uses
even more power domains than the MT8183 before it.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
[Angelo: Removed unneeded "sram" supply, added mt8195 to commit description]
Signed-off-by: AngeloGioachino Del Regno <angelogioacchino.delregno@collabora.com>