net: this_cpu_xxx conversions

Use modern this_cpu_xxx() api, saving few bytes on x86

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index d20fcd2..2aeb3a4 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -96,7 +96,7 @@
 		 * Another cpu is holding lock, requeue & delay xmits for
 		 * some time.
 		 */
-		__get_cpu_var(softnet_data).cpu_collision++;
+		__this_cpu_inc(softnet_data.cpu_collision);
 		ret = dev_requeue_skb(skb, q);
 	}