feat(rmi): add support for FEAT_LPA2 to the Realm Extension tests

This patch adds support to the current Realm Extension tests to
enable and use 52 bit address size with 4KB granularity when
FEAT_LPA2 is present.

In addition, this patch also introduces changes to support passing the
starting RTT level and the FEAT_LPA2 enable flag during realm creation
so they can be used later to implement tests for FEAT_LPA2 on RMI.

Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I0a930735a44772e5e76d6608c969759f27129917
9 files changed