AVR32: Enable networking

Implement MACB initialization for AVR32 and ATSTK1000, and turn
everything on, including the MACB driver.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
diff --git a/lib_avr32/board.c b/lib_avr32/board.c
index 2f16386..265328a 100644
--- a/lib_avr32/board.c
+++ b/lib_avr32/board.c
@@ -328,6 +328,13 @@
 	jumptable_init();
 	console_init_r();
 
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+#if defined(CONFIG_NET_MULTI)
+	puts("Net:   ");
+#endif
+	eth_initialize(gd->bd);
+#endif
+
 	for (;;) {
 		main_loop();
 	}