Now that we support PSCI and various security switches, we can let
U-boot boot Linux into non-secure and HYP mode.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>