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/defines.h b/drivers/net/e1000e/defines.h
index b32ed45..f2175ea 100644
--- a/drivers/net/e1000e/defines.h
+++ b/drivers/net/e1000e/defines.h
@@ -557,6 +557,7 @@
 #define NVM_INIT_3GIO_3            0x001A
 #define NVM_INIT_CONTROL3_PORT_A   0x0024
 #define NVM_CFG                    0x0012
+#define NVM_ALT_MAC_ADDR_PTR       0x0037
 #define NVM_CHECKSUM_REG           0x003F
 
 #define E1000_NVM_CFG_DONE_PORT_0  0x40000 /* MNG config cycle done */