serial: imx: Remove unneeded of_device_get_match_data() NULL check

Since 5.10-rc1 i.MX is a devicetree-only platform and the NULL check on
of_device_get_match_data() is no longer needed.

This check was only needed when this driver supported both DT and non-DT
platforms.

Remove the unneeded of_device_get_match_data() NULL check.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20201126124643.3371-1-festevam@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/imx.c

@@ -2174,9 +2174,6 @@ static int imx_uart_probe_dt(struct imx_port *sport,
 	int ret;
 
 	sport->devdata = of_device_get_match_data(&pdev->dev);
-	if (!sport->devdata)
-		/* no device tree device */
-		return 1;
 
 	ret = of_alias_get_id(np, "serial");
 	if (ret < 0) {