mxser: make mxser_port::ldisc_stop_rx a bool

It's used only as a yes-no variable, so make it a bool and switch the
set values appropriately.

Signed-off-by: Jiri Slaby <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/mxser.c

···
 	u8 IER;			/* Interrupt Enable Register */
 	u8 MCR;			/* Modem control register */
 
-	unsigned char ldisc_stop_rx;
+	bool ldisc_stop_rx;
 
 	struct async_icount icount; /* kernel counters for 4 input interrupts */
 	unsigned int timeout;
···
 {
 	struct mxser_port *info = tty->driver_data;
 
-	info->ldisc_stop_rx = 1;
+	info->ldisc_stop_rx = true;
 	if (I_IXOFF(tty)) {
 		if (info->board->must_hwid) {
 			info->IER &= ~MOXA_MUST_RECV_ISR;
···
 	struct mxser_port *info = tty->driver_data;
 
 	/* startrx */
-	info->ldisc_stop_rx = 0;
+	info->ldisc_stop_rx = false;
 	if (I_IXOFF(tty)) {
 		if (info->x_char)
 			info->x_char = 0;
···
 		tty_port_init(&info->port);
 		info->port.ops = &mxser_port_ops;
 		info->board = brd;
-		info->ldisc_stop_rx = 0;
+		info->ldisc_stop_rx = false;
 
 		/* Enhance mode enabled here */
 		if (brd->must_hwid != MOXA_OTHER_UART)