net: stmmac: socfpga: convert to devm_stmmac_pltfr_probe()

Convert socfpga to use devm_stmmac_pltfr_probe() to further simplify
the probe function, wrapping the call to the set_phy_mode() method
into socfpga_dwmac_init() which can be called from the plat_dat->init()
method. Also call this from socfpga_dwmac_resume() thereby simplifying
that function.

Using the devm variant also means we can remove the call to
stmmac_pltfr_remove().

Unfortunately, we can't also convert to stmmac_pltfr_pm_ops as there is
extra work done in socfpga_dwmac_resume().

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/E1u5Sns-001IJw-OY@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Russell King (Oracle)

drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c

@@ -500,11 +500,7 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
 
 	plat_dat->riwt_off = 1;
 
-	ret = socfpga_dwmac_init(pdev, dwmac);
-	if (ret)
-		return ret;
-
-	return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+	return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
 }
 
 static const struct socfpga_dwmac_ops socfpga_gen5_ops = {
@@ -524,7 +520,6 @@ MODULE_DEVICE_TABLE(of, socfpga_dwmac_match);
 
 static struct platform_driver socfpga_dwmac_driver = {
 	.probe  = socfpga_dwmac_probe,
-	.remove = stmmac_pltfr_remove,
 	.driver = {
 		.name           = "socfpga-dwmac",
 		.pm		= &stmmac_pltfr_pm_ops,