feat(planes): test SIMD access from plane N

Add tests to exercise access to SIMD functinality from Plane N.
The tests alternate execution of 'rdvl' instruction from Plane 0 and
Plane N in different sequences and combinations of TRAP_SIMD values.

Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I55b9bf55b43b72419e8244f228c505a58c2a819c
15 files changed