KVM: fix checkpatch.pl errors in kvm/irqchip.c

Fix whitespace around while
Signed-off-by: Kevin Mulvey <kmulvey@linux.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

virt/kvm/irqchip.c

@@ -105,7 +105,7 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
 	i = kvm_irq_map_gsi(kvm, irq_set, irq);
 	srcu_read_unlock(&kvm->irq_srcu, idx);
 
-	while(i--) {
+	while (i--) {
 		int r;
 		r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level,
 				   line_status);