serial: Delete dead code for CIR serial ports

Commit e4fda3a0 ("serial: don't register CIR serial ports") adds a
check for PORT_8250_CIR to serial8250_register_8250_port(). But the code
isn't needed as the function never takes the branch when the port is CIR
serial port.

This patch deletes the dead code.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_core.c

@@ -1043,24 +1043,13 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
 		if (up->dl_write)
 			uart->dl_write = up->dl_write;
 
-		if (uart->port.type != PORT_8250_CIR) {
 		if (serial8250_isa_config != NULL)
 			serial8250_isa_config(0, &uart->port,
 					&uart->capabilities);
 
-			ret = uart_add_one_port(&serial8250_reg,
-						&uart->port);
+		ret = uart_add_one_port(&serial8250_reg, &uart->port);
 		if (ret == 0)
 			ret = uart->port.line;
-		} else {
-			dev_info(uart->port.dev,
-				"skipping CIR port at 0x%lx / 0x%llx, IRQ %d\n",
-				uart->port.iobase,
-				(unsigned long long)uart->port.mapbase,
-				uart->port.irq);
-
-			ret = 0;
-		}
 	}
 	mutex_unlock(&serial_mutex);