ARM: mvebu: armada-xp: Sort boards and images alphabetically
Before adding new Armada XP based boards becomes messier than necessary,
sort Armada XP based board Kconfig and image Makefile alphabetically.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>