MAINTAINERS: Add entry for MediaTek PMIC LED driver

Add myself as a maintainer to support existing SoCs and push forward
following MediaTek PMICs with LEDs to reuse the driver.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
1 file changed