MAINTAINERS: Change Altera-PIO driver maintainer

Update Altera-PIO Driver maintainer from <mun.yew.tham@intel.com> to
<adrianhoyin.ng@altera.com> as Mun Yew is no longer with Altera.

Signed-off-by: Adrian Ng Ho Yin <adrianhoyin.ng@altera.com>
Acked-by: Mun Yew Tham <mun.yew.tham@intel.com>
Link: https://lore.kernel.org/r/20250825071637.40441-1-adrianhoyin.ng@altera.com


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>