kvm: fix compile on s390 part 2

We also need to fence the memunmap part.

Fixes: e45adf665a53 ("KVM: Introduce a new guest mapping API")
Fixes: d30b214d1d0a (kvm: fix compilation on s390)
Cc: Michal Kubecek <[e-mail]>
Cc: KarimAllah Ahmed <[e-mail]>
Signed-off-by: Christian Borntraeger <[e-mail]>

virt/kvm/kvm_main.c

···
 
 	if (map->page)
 		kunmap(map->page);
+#ifdef CONFIG_HAS_IOMEM
 	else
 		memunmap(map->hva);
+#endif
 
 	if (dirty) {
 		kvm_vcpu_mark_page_dirty(vcpu, map->gfn);