KVM: MMU: Add missing large page accounting to drop_large_spte()

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 8a9b27c..9270e0d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1798,6 +1798,7 @@
 {
 	if (is_large_pte(*sptep)) {
 		drop_spte(vcpu->kvm, sptep);
+		--vcpu->kvm->stat.lpages;
 		kvm_flush_remote_tlbs(vcpu->kvm);
 	}
 }