dt-bindings: arm: mediatek: Add compatible for MT6795 Sony Xperia M5

Add a compatible for the Sony Xperia M5 smartphone.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221027095504.37432-6-angelogioacchino.delregno@collabora.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>