Fix CONFIG_ETH*ADDR for Ocotea board.
Sort Makefile.
Update docs.
diff --git a/common/env_common.c b/common/env_common.c
index d46f24f..4aa043e 100644
--- a/common/env_common.c
+++ b/common/env_common.c
@@ -94,6 +94,9 @@
 #ifdef	CONFIG_ETH2ADDR
 	"eth2addr="	MK_STR(CONFIG_ETH2ADDR)		"\0"
 #endif
+#ifdef	CONFIG_ETH3ADDR
+	"eth3addr="	MK_STR(CONFIG_ETH3ADDR)		"\0"
+#endif
 #ifdef	CONFIG_IPADDR
 	"ipaddr="	MK_STR(CONFIG_IPADDR)		"\0"
 #endif