net: smc911x: Keep MAC programmed

Make sure to keep the MAC address programmed in the SMC911x ADDRH
and ADDRL registers. Linux can read those registers to determine
the MAC address on EEPROM-less configurations.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Tom Rini <trini@ti.com>

drivers/net/smc911x.c

@@ -187,6 +187,7 @@ static int smc911x_send(struct eth_device *dev, void *packet, int length)
 static void smc911x_halt(struct eth_device *dev)
 {
 	smc911x_reset(dev);
+	smc911x_handle_mac_address(dev);
 }
 
 static int smc911x_rx(struct eth_device *dev)