arm: kvm: STRICT_MM_TYPECHECKS fix for user_mem_abort

Commit:
b8865767 ARM: KVM: user_mem_abort: support stage 2 MMIO page mapping

introduced some code in user_mem_abort that failed to compile if
STRICT_MM_TYPECHECKS was enabled.

This patch fixes up the failing comparison.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Reviewed-by: Kim Phillips <kim.phillips@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

arch/arm/kvm/mmu.c

@@ -930,7 +930,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 		}
 		coherent_cache_guest_page(vcpu, hva, PAGE_SIZE);
 		ret = stage2_set_pte(kvm, memcache, fault_ipa, &new_pte,
-				     mem_type == PAGE_S2_DEVICE);
+			pgprot_val(mem_type) == pgprot_val(PAGE_S2_DEVICE));
 	}