e1000e: use alternate MAC address on ESB2 if available

Similar to 82571/2/3 parts that already do this, if ESB2/80003es2lan parts
have an alternate MAC address provided in the EEPROM use it instead of the
default MAC address.  This patch makes the the actual code that does this
generic so that it can be better used by both MAC families.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 02d67d0..d1a4514 100644
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -922,9 +922,12 @@
 	ew32(IMC, 0xffffffff);
 	icr = er32(ICR);
 
-	if (hw->mac.type == e1000_82571 &&
-		hw->dev_spec.e82571.alt_mac_addr_is_present)
-			e1000e_set_laa_state_82571(hw, true);
+	/* Install any alternate MAC address into RAR0 */
+	ret_val = e1000_check_alt_mac_addr_generic(hw);
+	if (ret_val)
+		return ret_val;
+
+	e1000e_set_laa_state_82571(hw, true);
 
 	/* Reinitialize the 82571 serdes link state machine */
 	if (hw->phy.media_type == e1000_media_type_internal_serdes)
@@ -1621,6 +1624,29 @@
 }
 
 /**
+ *  e1000_read_mac_addr_82571 - Read device MAC address
+ *  @hw: pointer to the HW structure
+ **/
+static s32 e1000_read_mac_addr_82571(struct e1000_hw *hw)
+{
+	s32 ret_val = 0;
+
+	/*
+	 * If there's an alternate MAC address place it in RAR0
+	 * so that it will override the Si installed default perm
+	 * address.
+	 */
+	ret_val = e1000_check_alt_mac_addr_generic(hw);
+	if (ret_val)
+		goto out;
+
+	ret_val = e1000_read_mac_addr_generic(hw);
+
+out:
+	return ret_val;
+}
+
+/**
  * e1000_power_down_phy_copper_82571 - Remove link during PHY power down
  * @hw: pointer to the HW structure
  *
@@ -1706,6 +1732,7 @@
 	.setup_link		= e1000_setup_link_82571,
 	/* .setup_physical_interface: media type dependent */
 	.setup_led		= e1000e_setup_led_generic,
+	.read_mac_addr		= e1000_read_mac_addr_82571,
 };
 
 static struct e1000_phy_operations e82_phy_ops_igp = {