ppc: cleanup compiler errors/warnings

Current u-boot top of tree builds with warnings/errors for
the following boards:

ads5121 cpci5200 mecp5200 v38b IAD210 MBX MBX860T NX823
RPXClassic debris PN62

following patch solves this.

Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/board/mbx8xx/mbx8xx.c b/board/mbx8xx/mbx8xx.c
index a3bf1f7..255796b 100644
--- a/board/mbx8xx/mbx8xx.c
+++ b/board/mbx8xx/mbx8xx.c
@@ -34,6 +34,7 @@
 #include <common.h>
 #include <commproc.h>
 #include <mpc8xx.h>
+#include <net.h>
 #include "dimm.h"
 #include "vpd.h"
 #include "csr.h"
@@ -257,7 +258,7 @@
 
 	if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
 		board_get_enetaddr(enetaddr);
-		eth_putenv_enetaddr("ethaddr", enetaddr);
+		eth_setenv_enetaddr("ethaddr", enetaddr);
 	}
 
 	return 0;