am335x: display msg when reading MAC from efuse

When ethaddr is not set in environment the MAC address is read
from efuse. The message was only printed in debug case, but this
message could be of interest for the ordinary user, so printf it.
Signed-off-by: NLars Poeschel <poeschel@lemonage.de>

board/ti/am335x/board.c

@@ -393,7 +393,7 @@ int board_eth_init(bd_t *bis)
 	uint32_t mac_hi, mac_lo;
 
 	if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
-		debug("<ethaddr> not set. Reading from E-fuse\n");
+		printf("<ethaddr> not set. Reading from E-fuse\n");
 		/* try reading mac address from efuse */
 		mac_lo = readl(&cdev->macid0l);
 		mac_hi = readl(&cdev->macid0h);