KVM: arm64: selftests: get-reg-list: Add base EL2 registers

Add the EL2 registers and the eventual dependencies, effectively
doubling the number of test vectors. Oh well.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250714122634.3334816-11-maz@kernel.org


Signed-off-by: Oliver Upton <oliver.upton@linux.dev>