MAINTAINERS: update ceph entries

- The Ceph common code is used by both fs/ceph and drivers/block/rbd.
  Add a separate maintainers entry.

- Add Ilya as libceph maintainer and cephfs submaintainer.

- Attribute Documentation/ABI/testing/sysfs-bus-rbd to rbd.

- [email protected] should be L, not M in rbd entry.

Signed-off-by: Sage Weil <[email protected]>
Signed-off-by: Ilya Dryomov <[email protected]>
1 file changed