MAINTAINERS: update Microchip's Atmel-HLCDC driver maintainers

MAINTAINERS: update Microchip's Atmel-HLCDC driver maintainers

Drop Sam Ravnborg and Boris Brezillon as they are no longer interested in
maintaining the drivers. Add myself and Dharma Balasubiramani as the
Maintainer and co-maintainer for Microchip's Atmel-HLCDC driver.
Thanks for their work.

Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240620095856.777390-1-manikandan.m@microchip.com
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>