KVM: s390: remove unneeded semicolon in gisa_vcpu_kicker()

Fix the following coccicheck warning:

arch/s390/kvm/interrupt.c:3085:2-3: Unneeded semicolon
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: NCornelia Huck <cohuck@redhat.com>
Reviewed-by: NDavid Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20200418081926.41666-1-yanaijie@huawei.comSigned-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>

arch/s390/kvm/interrupt.c

@@ -3082,7 +3082,7 @@ static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
 		__airqs_kick_single_vcpu(kvm, pending_mask);
 		hrtimer_forward_now(timer, ns_to_ktime(gi->expires));
 		return HRTIMER_RESTART;
-	};
+	}
 
 	return HRTIMER_NORESTART;
 }