arm64: refresh defconfig file

A number of Kconfig options have moved around in the defconfig
file over time. Move them to the place that they 'savedefconfig'
puts them at now, to better see which options are now gone
for some reason.

Reported-by: John Garry <john.garry@huawei.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>