net: stmmac: dwmac-generic: use stmmac_pltfr_probe()

Shrink the code and remove labels by using the new stmmac_pltfr_probe()
function.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20230623100417.93592-7-brgl@bgdev.plSigned-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -46,19 +46,12 @@ static int dwmac_generic_probe(struct platform_device *pdev)
 		plat_dat->unicast_filter_entries = 1;
 	}
 
-	/* Custom initialisation (if needed) */
-	ret = stmmac_pltfr_init(pdev, plat_dat);
+	ret = stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
 	if (ret)
 		goto err_remove_config_dt;
 
-	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
-	if (ret)
-		goto err_exit;
-
 	return 0;
 
-err_exit:
-	stmmac_pltfr_exit(pdev, plat_dat);
 err_remove_config_dt:
 	if (pdev->dev.of_node)
 		stmmac_remove_config_dt(pdev, plat_dat);