MAINTAINERS: update KHO and LIVE UPDATE maintainers

MAINTAINERS: update KHO and LIVE UPDATE maintainers

Patch series "MAINTAINERS: update KHO and LIVE UPDATE entries".

This series contains some updates for the Kexec Handover (KHO) and Live
update entries.  Patch 1 updates the maintainers list and adds the
liveupdate tree.  Patches 2 and 3 clean up stale files in the list.

This patch (of 3):

I have been helping out with reviewing and developing KHO.  I would also
like to help maintain it.  Change my entry from R to M for KHO and live
update.  Alex has been inactive for a while, so to avoid over-crowding the
KHO entry and to keep the information up-to-date, move his entry from M to
R.

We also now have a tree for KHO and live update at liveupdate/linux.git
where we plan to start maintaining those subsystems and start queuing the
patches.  List that in the entries as well.

Link: https://lore.kernel.org/20260414121752.1912847-1-pratyush@kernel.org
Link: https://lore.kernel.org/20260414121752.1912847-2-pratyush@kernel.org
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Reviewed-by: Alexander Graf <graf@amazon.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: David Hildenbrand <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>