tty: remove buf parameter from tty_name()

tty_name no longer uses the buf parameter, so remove it along with all
the 64 byte stack buffers that used to be passed in.

Mostly generated by the coccinelle script

@depends on patch@
identifier buf;
constant C;
expression tty;
@@
- char buf[C];
  <+...
- tty_name(tty, buf)
+ tty_name(tty)
  ...+>

allmodconfig compiles, so I'm fairly confident the stack buffers
weren't used for other purposes as well.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/crisv10.c

@@ -3216,9 +3216,7 @@ rs_throttle(struct tty_struct * tty)
 {
 	struct e100_serial *info = (struct e100_serial *)tty->driver_data;
 #ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-
-	printk("throttle %s: %lu....\n", tty_name(tty, buf),
+	printk("throttle %s: %lu....\n", tty_name(tty),
 	       (unsigned long)tty->ldisc.chars_in_buffer(tty));
 #endif
 	DFLOW(DEBUG_LOG(info->line,"rs_throttle %lu\n", tty->ldisc.chars_in_buffer(tty)));
@@ -3238,9 +3236,7 @@ rs_unthrottle(struct tty_struct * tty)
 {
 	struct e100_serial *info = (struct e100_serial *)tty->driver_data;
 #ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-
-	printk("unthrottle %s: %lu....\n", tty_name(tty, buf),
+	printk("unthrottle %s: %lu....\n", tty_name(tty),
 	       (unsigned long)tty->ldisc.chars_in_buffer(tty));
 #endif
 	DFLOW(DEBUG_LOG(info->line,"rs_unthrottle ldisc %d\n", tty->ldisc.chars_in_buffer(tty)));