KVM: PPC: Enable the PAPR CAP for Book3S

Now that Book3S PV mode can also run PAPR guests, we can add a PAPR cap and
enable it for all Book3S targets. Enabling that CAP switches KVM into PAPR
mode.

Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 490b041..6884054 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -555,6 +555,7 @@
 #define KVM_CAP_PPC_RMA	65
 #define KVM_CAP_MAX_VCPUS 66       /* returns max vcpus per vm */
 #define KVM_CAP_PPC_HIOR 67
+#define KVM_CAP_PPC_PAPR 68
 #define KVM_CAP_S390_GMAP 71
 
 #ifdef KVM_CAP_IRQ_ROUTING