avr32: fixup definitions to ATMEL_BASE_xxx

Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
diff --git a/board/miromico/hammerhead/hammerhead.c b/board/miromico/hammerhead/hammerhead.c
index a0794ba..911a0b3 100644
--- a/board/miromico/hammerhead/hammerhead.c
+++ b/board/miromico/hammerhead/hammerhead.c
@@ -68,7 +68,8 @@
 #ifdef CONFIG_CMD_NET
 int board_eth_init(bd_t *bis)
 {
-	return macb_eth_initialize(0, (void *)MACB0_BASE, bis->bi_phy_id[0]);
+	return macb_eth_initialize(0, (void *)ATMEL_BASE_MACB0,
+		bis->bi_phy_id[0]);
 }
 #endif