tun: put correct method name in a debug message.

This patch puts the correct method name, tun_do_read, in a debug message.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 1dfb135..607a3a5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1296,7 +1296,7 @@
 	struct sk_buff *skb;
 	ssize_t ret = 0;
 
-	tun_debug(KERN_INFO, tun, "tun_chr_read\n");
+	tun_debug(KERN_INFO, tun, "tun_do_read\n");
 
 	if (unlikely(!noblock))
 		add_wait_queue(&tfile->wq.wait, &wait);