KVM: MMU: use wrapper function to flush local tlb

Use kvm_mmu_flush_tlb() function instead of calling
kvm_x86_ops->tlb_flush(vcpu) directly.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kvm/mmu.c

@@ -1984,7 +1984,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
 		      reset_host_protection)) {
 		if (write_fault)
 			*ptwrite = 1;
-		kvm_x86_ops->tlb_flush(vcpu);
+		kvm_mmu_flush_tlb(vcpu);
 	}
 
 	pgprintk("%s: setting spte %llx\n", __func__, *sptep);