kvm_config: add CONFIG_S390_GUEST

make kvmconfig currently does not select CONFIG_S390_GUEST. Since
the virtio-ccw transport depends on CONFIG_S390_GUEST, we want
to add CONFIG_S390_GUEST to kvmconfig.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>

kernel/configs/kvm_guest.config

@@ -18,6 +18,7 @@ CONFIG_VIRTUALIZATION=y
 CONFIG_HYPERVISOR_GUEST=y
 CONFIG_PARAVIRT=y
 CONFIG_KVM_GUEST=y
+CONFIG_S390_GUEST=y
 CONFIG_VIRTIO=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_BLK=y