KVM: arm64: Use ARM64_MIN_PARANGE_BITS as the minimum supported IPA

Drop hard coded value for the minimum supported IPA range bits (i.e 32).
Instead use ARM64_MIN_PARANGE_BITS which improves the code readability.

Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-kernel@vger.kernel.org
Signed-off-by: NAnshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: NMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1628744994-16623-3-git-send-email-anshuman.khandual@arm.com

arch/arm64/kvm/reset.c

@@ -364,7 +364,7 @@ int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type)
 	phys_shift = KVM_VM_TYPE_ARM_IPA_SIZE(type);
 	if (phys_shift) {
 		if (phys_shift > kvm_ipa_limit ||
-		    phys_shift < 32)
+		    phys_shift < ARM64_MIN_PARANGE_BITS)
 			return -EINVAL;
 	} else {
 		phys_shift = KVM_PHYS_SHIFT;