new PHY @ e1000 - 2nd try

Add 82541ER device with latest integrated IGP2 PHY.
Introduced CONFIG_E1000_FALLBACK_MAC for NIC bring-up with empty eeprom.

Signed-off-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/README b/README
index 592d1d8..64127ab 100644
--- a/README
+++ b/README
@@ -751,6 +751,9 @@
 		CONFIG_E1000
 		Support for Intel 8254x gigabit chips.
 
+		CONFIG_E1000_FALLBACK_MAC
+		default MAC for empty eeprom after production.
+
 		CONFIG_EEPRO100
 		Support for Intel 82557/82559/82559ER chips.
 		Optional CONFIG_EEPRO100_SROM_WRITE enables eeprom