[S390] Use unsigned long long for u64 on 64bit.

As requested by Andrew. Same as what sparc did.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index cce40ff..3605df4 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -118,7 +118,7 @@
 		goto out;
 	}
 
-	VCPU_EVENT(vcpu, 5, "storing cpu address to %lx", useraddr);
+	VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
 out:
 	return 0;
 }