e1000e: alternate MAC address support

Port alternate MAC address support from the sourceforge
e1000 driver to the upstream e1000e driver.

Signed-off-by: Bill Hayes <bill.hayes@hp.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 6451578..1bb2052 100644
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -816,6 +816,7 @@
 
 struct e1000_dev_spec_82571 {
 	bool laa_is_present;
+	bool alt_mac_addr_is_present;
 };
 
 struct e1000_shadow_ram {