arm: orion5x: edminiv2: change maintainer

Since Albert Aribaud is not maintaining anymore the LaCie Ethernet Disk
mini V2 board, then I am taking over.

Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Stefan Roese <sr@denx.de>