serial: 8250_pnp: Remove unneeded ->iotype assignment

If ->iobase is set the default will be UPIO_PORT for ->iotype after
the uart_read_and_validate_port_properties() call. Hence no need
to assign that explicitly. Otherwise it will be UPIO_MEM.

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

drivers/tty/serial/8250/8250_pnp.c

···
 {
 	struct uart_8250_port uart, *port;
 	int ret, flags = dev_id->driver_data;
-	unsigned char iotype;
 	long line;
 
 	if (flags & UNKNOWN_DEV) {
···
 	memset(&uart, 0, sizeof(uart));
 	if ((flags & CIR_PORT) && pnp_port_valid(dev, 2)) {
 		uart.port.iobase = pnp_port_start(dev, 2);
-		iotype = UPIO_PORT;
 	} else if (pnp_port_valid(dev, 0)) {
 		uart.port.iobase = pnp_port_start(dev, 0);
-		iotype = UPIO_PORT;
 	} else if (pnp_mem_valid(dev, 0)) {
 		uart.port.mapbase = pnp_mem_start(dev, 0);
 		uart.port.mapsize = pnp_mem_len(dev, 0);
-		iotype = UPIO_MEM;
 		uart.port.flags = UPF_IOREMAP;
 	} else
 		return -ENODEV;
···
 		ret = 0;
 	if (ret)
 		return ret;
-
-	/*
-	 * The previous call may not set iotype correctly when reg-io-width
-	 * property is absent and it doesn't support IO port resource.
-	 */
-	uart.port.iotype = iotype;
 
 	if (flags & CIR_PORT) {
 		uart.port.flags |= UPF_FIXED_PORT | UPF_FIXED_TYPE;