[bugfix]modify ethernet reset delay 100ms before access registers

Change-Id: Ice1ab395b7f530805bcaf91a56e39c46a6a8f94a
diff --git a/src/kernel/linux/v4.19/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/src/kernel/linux/v4.19/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index e6d821e..9e86a19 100644
--- a/src/kernel/linux/v4.19/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/src/kernel/linux/v4.19/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -313,7 +313,7 @@
 			msleep(DIV_ROUND_UP(data->delays[2], 1000));
 	}
 #endif
-
+    msleep(100);
 	if (data->phy_reset) {
 		netdev_dbg(ndev, "stmmac_mdio_reset: calling phy_reset\n");
 		data->phy_reset(priv->plat->bsp_priv);