test(rme): check various SIMD state preserved across NS/RL switch

Thie test case verifies whether various SIMD related registers like
Q[0-31], FPCR, FPSR, Z[0-31], P[0-15], FFR are preserved by RMM during
world switch between NS world and Realm world.

Randomly verify FPU registers or SVE registers if the system supports
SVE. Within SVE, randomly configure SVE vector length.

This testcase runs on below configs:
* with SVE
* without SVE

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I3fc755f75bdcdc8c24af0440d8a5f094beafca73
8 files changed