Despite having the control bits for FEAT_SPECRES and FEAT_PACM,
the ID registers fields are either incomplete or missing.

Fix it.
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20240214131827.2856277-2-maz@kernel.orgSigned-off-by: Oliver Upton <oliver.upton@linux.dev>