arm64/cpufeature: Add remaining feature bits in ID_MMFR4 register

Enable all remaining feature bits like EVT, CCIDX, LSM, HPDS, CnP, XNX,
SpecSEI in ID_MMFR4 register per ARM DDI 0487F.a.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1589881254-10082-9-git-send-email-anshuman.khandual@arm.com


Signed-off-by: Will Deacon <will@kernel.org>