dt-bindings: mediatek: Drop inactive MandyJH Liu

dt-bindings: mediatek: Drop inactive MandyJH Liu

There are no emails from MandyJH Liu, no reviews [1] of these bindings, so
clearly no maintenance is happening here.  Switch to Mediatek SoC
maintainers.

Cc: MandyJH Liu <mandyjh.liu@mediatek.com>
Link: https://lore.kernel.org/all/?q=f%3Amandyjh.liu%40mediatek.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20251219074035.13001-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>