net: bcmgenet: fix GPHY power-up sequence

We were missing a number of extra steps and delays to power-up the GPHY, update
the sequence to reflect the proper procedure here.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/bcmmii.c

@@ -179,14 +179,18 @@ static void bcmgenet_phy_power_set(struct net_device *dev, bool enable)
 
 	if (enable) {
 		reg = bcmgenet_ext_readl(priv, EXT_GPHY_CTRL);
-		reg &= ~(EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN | EXT_CK25_DIS);
+		reg &= ~EXT_CK25_DIS;
+		bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
+		mdelay(1);
+
+		reg &= ~(EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN);
 		reg |= EXT_GPHY_RESET;
 		bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
-		mdelay(2);
+		mdelay(1);
 
 		reg &= ~EXT_GPHY_RESET;
 		bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
-		udelay(20);
+		udelay(60);
 	}
 }