tty: omap-serial: Fix initial on-boot RTS GPIO level

The rs485 flag "SER_RS485_RTS_AFTER_SEND" was wrongly read from the GPIO
flags. This caused the RTS pin to be high during boot.

Signed-off-by: Rafael Gago Castano <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/serial/omap-serial.c

···
 				   struct device_node *np)
 {
 	struct serial_rs485 *rs485conf = &up->port.rs485;
-	enum of_gpio_flags flags;
 	int ret;
 
 	rs485conf->flags = 0;
···
 	}
 
 	/* check for tx enable gpio */
-	up->rts_gpio = of_get_named_gpio_flags(np, "rts-gpio", 0, &flags);
+	up->rts_gpio = of_get_named_gpio(np, "rts-gpio", 0);
 	if (gpio_is_valid(up->rts_gpio)) {
 		ret = devm_gpio_request(up->dev, up->rts_gpio, "omap-serial");
 		if (ret < 0)
 			return ret;
-		ret = gpio_direction_output(up->rts_gpio,
-					    flags & SER_RS485_RTS_AFTER_SEND);
+		ret = rs485conf->flags & SER_RS485_RTS_AFTER_SEND ? 1 : 0;
+		ret = gpio_direction_output(up->rts_gpio, ret);
 		if (ret < 0)
 			return ret;
 	} else if (up->rts_gpio == -EPROBE_DEFER) {