Adds two more ethernet interface to 83xx

Added as a convenience for other platforms that uses MPC8360 (has 8 UCC).
Six eth interface is chosen because the platform I am using combines
UCC1&2 and UCC3&4 as 1000 Eth and the other four UCCs as 10/100 Eth.

Signed-off-by: Richard Retanubun <RichardRetanubun@RugggedCom.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/README b/README
index ccd839c..8802304 100644
--- a/README
+++ b/README
@@ -1095,8 +1095,11 @@
 
 - Ethernet address:
 		CONFIG_ETHADDR
+		CONFIG_ETH1ADDR
 		CONFIG_ETH2ADDR
 		CONFIG_ETH3ADDR
+		CONFIG_ETH4ADDR
+		CONFIG_ETH5ADDR
 
 		Define a default value for Ethernet address to use
 		for the respective Ethernet interface, in case this