[NET]: should explicitely initialize atomic_t field in struct dst_ops

All but one struct dst_ops static initializations miss explicit
initialization of entries field.

As this field is atomic_t, we should use ATOMIC_INIT(0), and not
rely on atomic_t implementation.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/xfrm6_policy.c

@@ -272,6 +272,7 @@ static struct dst_ops xfrm6_dst_ops = {
 	.local_out =		__ip6_local_out,
 	.gc_thresh =		1024,
 	.entry_size =		sizeof(struct xfrm_dst),
+	.entries =		ATOMIC_INIT(0),
 };
 
 static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {