Revert "KVM: PPC: e500: Mark "struct page" pfn accessed before dropping mmu_lock"

This reverts commit f2623aec7f which is
commit 84cf78dcd9d65c45ab73998d4ad50f433d53fb93 upstream.

It should not have been applied.

Link: https://lore.kernel.org/r/CABgObfb5U9zwTQBPkPB=mKu-vMrRspPCm4wfxoQpB+SyAnb5WQ@mail.gmail.com
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/powerpc/kvm/e500_mmu_host.c

@@ -498,9 +498,11 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
 	kvmppc_mmu_flush_icache(pfn);
 
 out:
+	spin_unlock(&kvm->mmu_lock);
+
 	/* Drop refcount on page, so that mmu notifiers can clear it */
 	kvm_release_pfn_clean(pfn);
-	spin_unlock(&kvm->mmu_lock);
+
 	return ret;
 }