Fix broken Tinkerboard booting due to changes in stmmac driver (#1734)

config/kernel/linux-rockchip-current.config

@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/arm 5.4.6 Kernel Configuration
+# Linux/arm 5.4.10 Kernel Configuration
 #
 
 #

patch/kernel/rockchip-current/general-temporary-ethernet-fixup.patch

@@ -0,0 +1,23 @@
+This is a temporary fix for ethernet with kernels 5.4.7+
+
+It reverts the following change: https://patchwork.ozlabs.org/patch/1213121/
+which disabled mdio init for most of the boards except NanoPi M4(V2)
+or NanoPC T4 which have proper device tree definition for mdio/phy.
+
+The proper fix will be to add phy device tree node for boards that miss
+it.
+
+---
+diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+index 170c3a052b14..1f230bd854c4 100644
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+@@ -320,7 +320,7 @@ out:
+ static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
+ 			 struct device_node *np, struct device *dev)
+ {
+-	bool mdio = false;
++	bool mdio = true;
+ 	static const struct of_device_id need_mdio_ids[] = {
+ 		{ .compatible = "snps,dwc-qos-ethernet-4.10" },
+ 		{},