mxser: remove tty parameter from mxser_receive_chars_new()

After the previous change (no plays with of tty->receive_room), the tty
parameter is unused.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20211118073125.12283-16-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/mxser.c

@@ -1491,8 +1491,7 @@ static int mxser_rs_break(struct tty_struct *tty, int break_state)
 	return 0;
 }
 
-static bool mxser_receive_chars_new(struct tty_struct *tty,
-		struct mxser_port *port, u8 status)
+static bool mxser_receive_chars_new(struct mxser_port *port, u8 status)
 {
 	enum mxser_must_hwid hwid = port->board->must_hwid;
 	u8 gdl;
@@ -1570,7 +1569,7 @@ static u8 mxser_receive_chars_old(struct tty_struct *tty,
 static u8 mxser_receive_chars(struct tty_struct *tty,
 		struct mxser_port *port, u8 status)
 {
-	if (!mxser_receive_chars_new(tty, port, status))
+	if (!mxser_receive_chars_new(port, status))
 		status = mxser_receive_chars_old(tty, port, status);
 
 	tty_flip_buffer_push(&port->port);