net: sync env ethaddr to device enetaddr in eth_init()

In the previous enetaddr refactoring, the assumption with commit 56b555a644
was that the eth layer would handle the env -> device enetaddr syncing.
This was not the case as eth_initialize() is called only once and the sync
occurs there.  So make sure the eth_init() function does the env -> device
sync with every network init.

Reported-by: Andrzej Wolski <awolski@poczta.fm>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/include/net.h b/include/net.h
index 4a03717..4873000 100644
--- a/include/net.h
+++ b/include/net.h
@@ -119,10 +119,10 @@
 extern struct eth_device *eth_get_dev_by_name(char *devname); /* get device */
 extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
 extern int eth_get_dev_index (void);		/* get the device index */
-extern void eth_set_enetaddr(int num, char* a);	/* Set new MAC address */
 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
+extern int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr);
 
 extern int eth_init(bd_t *bis);			/* Initialize the device */
 extern int eth_send(volatile void *packet, int length);	   /* Send a packet */