MAINTAINERS: Input: Drop melfas-mip4 section

Emails to the sole melfas-mip4 driver maintainer bounce:

  550 <jeesw@melfas.com> No such user here (connected from melfas.com)

so clearly this is not a supported driver anymore.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250910142526.105286-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>