dt-bindings: vendor-prefixes: Add Mayqueen name

Mayqueen is a Taiwan-based company primarily focused on the development
of arm64 development boards and e-paper displays.

Signed-off-by: Wig Cheng <onlywig@gmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250902-drm-v5-1-d77c678c4ae3@gmail.com