arm64/cpufeature: Drop open encodings while extracting parange

Currently there are multiple instances of parange feature width mask open
encodings while fetching it's value. Even the width mask value (0x7) itself
is not accurate. It should be (0xf) per ID_AA64MMFR0_EL1.PARange[3:0] as in
ARM ARM (0487F.a). Replace them with cpuid_feature_extract_unsigned_field()
which can extract given standard feature (4 bits width i.e 0xf mask) field.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/1589360614-1164-1-git-send-email-anshuman.khandual@arm.com


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