netfilter: xt extensions: use pr_<level>

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/net/netfilter/xt_HL.c b/net/netfilter/xt_HL.c
index 10e789e..7004ed2 100644
--- a/net/netfilter/xt_HL.c
+++ b/net/netfilter/xt_HL.c
@@ -9,7 +9,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include <linux/module.h>
 #include <linux/skbuff.h>
 #include <linux/ip.h>
@@ -106,8 +106,7 @@
 	const struct ipt_TTL_info *info = par->targinfo;
 
 	if (info->mode > IPT_TTL_MAXMODE) {
-		printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
-			info->mode);
+		pr_info("TTL: invalid or unknown mode %u\n", info->mode);
 		return false;
 	}
 	if (info->mode != IPT_TTL_SET && info->ttl == 0)
@@ -120,12 +119,11 @@
 	const struct ip6t_HL_info *info = par->targinfo;
 
 	if (info->mode > IP6T_HL_MAXMODE) {
-		printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
-			info->mode);
+		pr_info("invalid or unknown mode %u\n", info->mode);
 		return false;
 	}
 	if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
-		printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
+		pr_info("increment/decrement does not "
 			"make sense with value 0\n");
 		return false;
 	}