x25: convert printks to pr_<level>

use pr_<level> instead of printk(LEVEL)

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/x25/x25_in.c b/net/x25/x25_in.c
index a49cd4e..d1b0dc7 100644
--- a/net/x25/x25_in.c
+++ b/net/x25/x25_in.c
@@ -23,6 +23,8 @@
  *					  i-frames.
  */
 
+#define pr_fmt(fmt) "X25: " fmt
+
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
@@ -317,7 +319,7 @@
 			break;
 
 		default:
-			printk(KERN_WARNING "x25: unknown %02X in state 3\n", frametype);
+			pr_warn("unknown %02X in state 3\n", frametype);
 			break;
 	}