tty: vt: use printk_once

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index ad6ba4e..8e67d5c 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -393,9 +393,7 @@
 		termios->c_cflag |= (BOTHER << IBSHIFT);
 #else
 	if (ifound == -1 || ofound == -1) {
-		static int warned;
-		if (!warned++)
-			printk(KERN_WARNING "tty: Unable to return correct "
+		printk_once(KERN_WARNING "tty: Unable to return correct "
 			  "speed data as your architecture needs updating.\n");
 	}
 #endif