ipw2200: set MAC address on radiotap interface

Commit bada339b enforces that all
interfaces have a valid MAC address before they are brought up.

ipw2200 does not assign a MAC address to it's radiotap interface, meaning
that the radiotap interface cannot be brought up in 2.6.24.
https://bugs.gentoo.org/show_bug.cgi?id=215714

Fix this by copying the MAC address from the real interface.
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2200.c

@@ -11576,6 +11576,7 @@ static int ipw_prom_alloc(struct ipw_priv *priv)
 	priv->prom_priv->priv = priv;
 
 	strcpy(priv->prom_net_dev->name, "rtap%d");
+	memcpy(priv->prom_net_dev->dev_addr, priv->mac_addr, ETH_ALEN);
 
 	priv->prom_net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
 	priv->prom_net_dev->open = ipw_prom_open;