MAINTAINERS: Remove Hyun and Anurag from maintainer list

There is no activity from them for these drivers. All of them have Laurent
as active maintainer and their emails no longer works that's why remove
them from the list.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/18700dda117076510baf87a090acbb29cb3ba3ba.1684244832.git.michal.simek@amd.com