Brian has been maintaining the MTD subsystem alone for several years
now, and maintaining such a subsystem can really be time consuming.

Create a maintainer team formed of the most active MTD contributors
to help Brian with this task, which will hopefully improve the
subsystem reactivity.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NCyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: NMarek Vasut <marek.vasut@gmail.com>
Acked-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>