net/sctp: Use pr_fmt and pr_<level>

Change SCTP_DEBUG_PRINTK and SCTP_DEBUG_PRINTK_IPADDR to
use do { print } while (0) guards.
Add SCTP_DEBUG_PRINTK_CONT to fix errors in log when
lines were continued.
Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
Add a missing newline in "Failed bind hash alloc"

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/probe.c b/net/sctp/probe.c
index db3a42b..2e63e9d 100644
--- a/net/sctp/probe.c
+++ b/net/sctp/probe.c
@@ -22,6 +22,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/kprobes.h>
 #include <linux/socket.h>
@@ -192,7 +194,7 @@
 	if (ret)
 		goto remove_proc;
 
-	pr_info("SCTP probe registered (port=%d)\n", port);
+	pr_info("probe registered (port=%d)\n", port);
 
 	return 0;