[POWERPC] properly declare onstack completion in iseries veth

The iSeries veth driver uses an on-stack struct completion that
it initializes using the COMPLETION_INITIALIZER instead of
COMPLETION_INITIALIZER_ONSTACK macro, causing problems with
lockdep.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c
index 58d3bb6..b8d0639 100644
--- a/drivers/net/iseries_veth.c
+++ b/drivers/net/iseries_veth.c
@@ -308,7 +308,8 @@
 
 static int veth_allocate_events(HvLpIndex rlp, int number)
 {
-	struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 };
+	struct veth_allocation vc =
+		{ COMPLETION_INITIALIZER_ONSTACK(vc.c), 0 };
 
 	mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan,
 			    sizeof(struct veth_lpevent), number,