There is no general support for 64-bit big endian accesses, so that is
left unsupported.
Signed-off-by: NAndreas Larsson <andreas@gaisler.com>
Acked-by: NAnton Vorontsov <anton@enomsg.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>