serial: 8250_of: Use of_device_get_match_data()

Use of_device_get_match_data() to simplify the code a bit.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: John Garry <john.garry@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_of.c

@@ -205,18 +205,16 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 /*
  * Try to register a serial port
  */
-static const struct of_device_id of_platform_serial_table[];
 static int of_platform_serial_probe(struct platform_device *ofdev)
 {
-	const struct of_device_id *match;
 	struct of_serial_info *info;
 	struct uart_8250_port port8250;
+	unsigned int port_type;
 	u32 tx_threshold;
-	int port_type;
 	int ret;
 
-	match = of_match_device(of_platform_serial_table, &ofdev->dev);
-	if (!match)
+	port_type = (unsigned long)of_device_get_match_data(&ofdev->dev);
+	if (port_type == PORT_UNKNOWN)
 		return -EINVAL;
 
 	if (of_property_read_bool(ofdev->dev.of_node, "used-by-rtas"))
@@ -226,7 +224,6 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
 	if (info == NULL)
 		return -ENOMEM;
 
-	port_type = (unsigned long)match->data;
 	memset(&port8250, 0, sizeof(port8250));
 	ret = of_platform_serial_setup(ofdev, port_type, &port8250.port, info);
 	if (ret)