MAINTAINERS: sort F entries for Marvell EBU maintainers

This commit sorts alphabetically the file entries of the Marvell EBU
maintainers in the MAINTAINERS file.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>