test: FFA_ABORT ABI not supported at Nwd interface

FFA_ABORT is supported only at secure FF-A interfaces. It is not
exposed to NWd callers.

This patch enhances an existing test to ensure FFA_ABORT ABIs are
not supported when invoked in normal world.

Change-Id: I2bfd2abd8db182aad4d9491b210b384e79059291
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
2 files changed