IPVS: use pr_err and friends instead of IP_VS_ERR and friends

Since pr_err and friends are used instead of printk there is no point
in keeping IP_VS_ERR and friends.  Furthermore make use of '__func__'
instead of hard coded function names.

Signed-off-by: Hannes Eder <heder@google.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/ipvs/ip_vs_rr.c b/net/netfilter/ipvs/ip_vs_rr.c
index b01007e..e210f37 100644
--- a/net/netfilter/ipvs/ip_vs_rr.c
+++ b/net/netfilter/ipvs/ip_vs_rr.c
@@ -51,7 +51,7 @@
 	struct list_head *p, *q;
 	struct ip_vs_dest *dest;
 
-	IP_VS_DBG(6, "ip_vs_rr_schedule(): Scheduling...\n");
+	IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
 
 	write_lock(&svc->sched_lock);
 	p = (struct list_head *)svc->sched_data;