tty: Replace TTY_THROTTLED bit tests with tty_throttled()

Abstract TTY_THROTTLED bit tests with tty_throttled().

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/mmc/card/sdio_uart.c

@@ -895,7 +895,7 @@ static void sdio_uart_set_termios(struct tty_struct *tty,
 	/* Handle transition away from B0 status */
 	if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) {
 		unsigned int mask = TIOCM_DTR;
-		if (!(cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags))
+		if (!(cflag & CRTSCTS) || !tty_throttled(tty))
 			mask |= TIOCM_RTS;
 		sdio_uart_set_mctrl(port, mask);
 	}