sunxi: Add xzpad700 board

Submitted-by: Davide <louigi600@yahoo.it>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
sunxi-mk802: The orginal mk802 does not have an axp

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Added Marsboard-A10 to sunxi-current
Added NO_AXP to boards.cfg & updated dram config
Rebase conflicts