- Remove references to removed build options.
- Remove support for LOAD_IMAGE_V2=0.
- Migrate to sp_min_early_platform_setup2().

Change-Id: I884399139fb8e2554adeded888969f44672d56c0
Co-authored-by: Jens Wiklander <jens.wiklander@linaro.org>
Tested-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>