s390x: Enable vector processing capability

Everything is finally in place, inform the kernel that user space
supports vector registers.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

target-s390x/kvm.c

diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 61e1321..6de7759 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -269,6 +269,7 @@
     }
 
     kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
+    kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
     kvm_vm_enable_cap(s, KVM_CAP_S390_USER_STSI, 0);
 
     return 0;