arm: mvebu: Disable JFFS2 support for Kirkwood and Armada XP boards

These boards don't use JFFS2 file system for booting so remove it.

Ref: https://lore.kernel.org/u-boot/20241114233005.GN3600562@bill-the-cat/T/#t
Signed-off-by: Tony Dinh <mibodhi@gmail.com>
Acked-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
11 files changed