net: Remove all calls to net_random_ethaddr()

Remove the calls to net_random_ethaddr() that some boards and some
drivers are calling. This is now implemented inside of net/eth.c

Enable the feature for all boards that previously enabled it.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-By: Michael Walle <michael@walle.cc> (for the lsxl board part)

Series-changes: 2
-Fixed bfin build errors

board/bf537-pnav/bf537-pnav.c

@@ -23,26 +23,8 @@ int checkboard(void)
 }
 
 #ifdef CONFIG_BFIN_MAC
-static void board_init_enetaddr(uchar *mac_addr)
-{
-	puts("Warning: Generating 'random' MAC address\n");
-	net_random_ethaddr(mac_addr);
-	eth_setenv_enetaddr("ethaddr", mac_addr);
-}
-
 int board_eth_init(bd_t *bis)
 {
 	return bfin_EMAC_initialize(bis);
 }
 #endif
-
-int misc_init_r(void)
-{
-#ifdef CONFIG_BFIN_MAC
-	uchar enetaddr[6];
-	if (!eth_getenv_enetaddr("ethaddr", enetaddr))
-		board_init_enetaddr(enetaddr);
-#endif
-
-	return 0;
-}