net: ethernet: arc: remove emac_arc driver

The last real user nSIM_700 of the "snps,arc-emac" compatible string in
a driver was removed in 2019. The use of this string in the combined DT of
rk3066a/rk3188 as place holder has also been replaced, so
remove emac_arc.c to clean up some code.

Signed-off-by: Johan Jonker <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Acked-by: Paolo Abeni <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/arc/Kconfig

···
 	select PHYLIB
 	select CRC32
 
-config ARC_EMAC
-	tristate "ARC EMAC support"
-	select ARC_EMAC_CORE
-	depends on OF_IRQ
-	depends on ARC || COMPILE_TEST
-	help
-	  On some legacy ARC (Synopsys) FPGA boards such as ARCAngel4/ML50x
-	  non-standard on-chip ethernet device ARC EMAC 10/100 is used.
-	  Say Y here if you have such a board.  If unsure, say N.
-
 config EMAC_ROCKCHIP
 	tristate "Rockchip EMAC support"
 	select ARC_EMAC_CORE

drivers/net/ethernet/arc/Makefile

···
 
 arc_emac-objs := emac_main.o emac_mdio.o
 obj-$(CONFIG_ARC_EMAC_CORE) += arc_emac.o
-obj-$(CONFIG_ARC_EMAC) += emac_arc.o
 obj-$(CONFIG_EMAC_ROCKCHIP) += emac_rockchip.o

drivers/net/ethernet/arc/emac_arc.c

···
-// SPDX-License-Identifier: GPL-2.0-or-later
-/**
- * DOC: emac_arc.c - ARC EMAC specific glue layer
- *
- * Copyright (C) 2014 Romain Perier
- *
- * Romain Perier  <[e-mail]>
- */
-
-#include <linux/etherdevice.h>
-#include <linux/module.h>
-#include <linux/of_net.h>
-#include <linux/platform_device.h>
-
-#include "emac.h"
-
-#define DRV_NAME    "emac_arc"
-
-static int emac_arc_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct arc_emac_priv *priv;
-	phy_interface_t interface;
-	struct net_device *ndev;
-	int err;
-
-	if (!dev->of_node)
-		return -ENODEV;
-
-	ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
-	if (!ndev)
-		return -ENOMEM;
-	platform_set_drvdata(pdev, ndev);
-	SET_NETDEV_DEV(ndev, dev);
-
-	priv = netdev_priv(ndev);
-	priv->drv_name = DRV_NAME;
-
-	err = of_get_phy_mode(dev->of_node, &interface);
-	if (err) {
-		if (err == -ENODEV)
-			interface = PHY_INTERFACE_MODE_MII;
-		else
-			goto out_netdev;
-	}
-
-	priv->clk = devm_clk_get(dev, "hclk");
-	if (IS_ERR(priv->clk)) {
-		dev_err(dev, "failed to retrieve host clock from device tree\n");
-		err = -EINVAL;
-		goto out_netdev;
-	}
-
-	err = arc_emac_probe(ndev, interface);
-out_netdev:
-	if (err)
-		free_netdev(ndev);
-	return err;
-}
-
-static void emac_arc_remove(struct platform_device *pdev)
-{
-	struct net_device *ndev = platform_get_drvdata(pdev);
-
-	arc_emac_remove(ndev);
-	free_netdev(ndev);
-}
-
-static const struct of_device_id emac_arc_dt_ids[] = {
-	{ .compatible = "snps,arc-emac" },
-	{ /* Sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
-
-static struct platform_driver emac_arc_driver = {
-	.probe = emac_arc_probe,
-	.remove_new = emac_arc_remove,
-	.driver = {
-		.name = DRV_NAME,
-		.of_match_table  = emac_arc_dt_ids,
-	},
-};
-
-module_platform_driver(emac_arc_driver);
-
-MODULE_AUTHOR("Romain Perier <[e-mail]>");
-MODULE_DESCRIPTION("ARC EMAC platform driver");
-MODULE_LICENSE("GPL");