ARMv9.5 has infroduced ID_AA64MMFR4_EL1 with a bunch of new features.
Add the corresponding layout.

This is extracted from the public ARM SysReg_xml_A_profile-2023-09
delivery, timestamped d55f5af8e09052abe92a02adf820deea2eaed717.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20240122181344.258974-5-maz@kernel.orgSigned-off-by: Oliver Upton <oliver.upton@linux.dev>