mpc83xx: add QE ethernet support

this patch adds support for the QUICC Engine based UCC gigabit ethernet device.
diff --git a/net/eth.c b/net/eth.c
index e8ac251..022d423 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -54,6 +54,7 @@
 extern int skge_initialize(bd_t*);
 extern int tsec_initialize(bd_t*, int, char *);
 extern int npe_initialize(bd_t *);
+extern int uec_initialize(int);
 
 static struct eth_device *eth_devices, *eth_current;
 
@@ -196,6 +197,12 @@
 	tsec_initialize(bis, 3, CONFIG_MPC83XX_TSEC4_NAME);
 #    endif
 #endif
+#if defined(CONFIG_UEC_ETH1)
+	uec_initialize(0);
+#endif
+#if defined(CONFIG_UEC_ETH2)
+	uec_initialize(1);
+#endif
 #if defined(CONFIG_MPC86XX_TSEC1)
        tsec_initialize(bis, 0, CONFIG_MPC86XX_TSEC1_NAME);
 #endif