RTIC: Move selinux_state to a separate 4k

We need to relocate selinux_state to a separate 4k page
to enable EL2 Hypervisor to monitor changes to this
variable using ARM stage 2 MMU. We will avoid getting
page faults from un-related data as the MMU granularity
is configured to 4k.

Change-Id: I67ed3d994d6df473ade968dca3f96a7aee3afa2d
Signed-off-by: Preeti Nagar <pnagar@codeaurora.org>