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>

Author: hoyin0722

MAINTAINERS

@@ -931,7 +931,7 @@ F:	Documentation/devicetree/bindings/dma/altr,msgdma.yaml
 F:	drivers/dma/altera-msgdma.c
 
 ALTERA PIO DRIVER
-M:	Mun Yew Tham <mun.yew.tham@intel.com>
+M:	Adrian Ng <adrianhoyin.ng@altera.com>
 L:	linux-gpio@vger.kernel.org
 S:	Maintained
 F:	drivers/gpio/gpio-altera.c