net: stmmac: Don't set has_gmac if has_gmac4 is set

Some Rockchip platforms have a GMAC4 core, and therefore
'plat_stmmacenet_data.has_gmac' shouldn't be set if
'plat_stmmacenet_data.has_gmac4' is set.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -1448,6 +1448,10 @@ static int rk_gmac_probe(struct platform_device *pdev)
 	if (IS_ERR(plat_dat))
 		return PTR_ERR(plat_dat);
 
+	/* If the stmmac is not already selected as gmac4,
+	 * then make sure we fallback to gmac.
+	 */
+	if (!plat_dat->has_gmac4)
 		plat_dat->has_gmac = true;
 	plat_dat->fix_mac_speed = rk_fix_speed;