dt-bindings: phy: mediatek,tphy: Add compatible for MT8192

Add MT8192 compatible to the Mediatek T-PHY dt-binding.

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20220224130822.11292-2-allen-kh.cheng@mediatek.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>