Rename config-arm-a10 -> config-arm-sun4i

This is a preparation patch for adding support for sun5i (A10s, A13)

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
config-arm-sun5i: Add

Start with a copy of config-arm-sun4i, with just the arch changed to sun5i

Signed-off-by: Hans de Goede <hdegoede@redhat.com>