can: flexcan: convert the driver to DT-only

The flexcan driver runs only on DT platforms, so simplify the code by using
of_device_get_match_data() to retrieve the driver data and also by removing the
unused id_table.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20201128132855.7724-1-festevam@gmail.comSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/flexcan.c

@@ -1940,15 +1940,8 @@ static const struct of_device_id flexcan_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, flexcan_of_match);
 
-static const struct platform_device_id flexcan_id_table[] = {
-	{ .name = "flexcan", .driver_data = (kernel_ulong_t)&fsl_p1010_devtype_data, },
-	{ /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(platform, flexcan_id_table);
-
 static int flexcan_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *of_id;
 	const struct flexcan_devtype_data *devtype_data;
 	struct net_device *dev;
 	struct flexcan_priv *priv;
@@ -1997,15 +1990,7 @@ static int flexcan_probe(struct platform_device *pdev)
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 
-	of_id = of_match_device(flexcan_of_match, &pdev->dev);
-	if (of_id) {
-		devtype_data = of_id->data;
-	} else if (platform_get_device_id(pdev)->driver_data) {
-		devtype_data = (struct flexcan_devtype_data *)
-			platform_get_device_id(pdev)->driver_data;
-	} else {
-		return -ENODEV;
-	}
+	devtype_data = of_device_get_match_data(&pdev->dev);
 
 	if ((devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) &&
 	    !(devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)) {
@@ -2235,7 +2220,6 @@ static struct platform_driver flexcan_driver = {
 	},
 	.probe = flexcan_probe,
 	.remove = flexcan_remove,
-	.id_table = flexcan_id_table,
 };
 
 module_platform_driver(flexcan_driver);