staging: r8188eu: use random default mac address

Use a random default mac address instead of a fixed one to reduce the
likelihood of mac address collision.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210830121508.6411-6-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_ieee80211.c

@@ -1033,15 +1033,8 @@ void rtw_macaddr_cfg(u8 *mac_addr)
 	}
 
 	if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) {
-		mac[0] = 0x00;
-		mac[1] = 0xe0;
-		mac[2] = 0x4c;
-		mac[3] = 0x87;
-		mac[4] = 0x00;
-		mac[5] = 0x00;
-		/*  use default mac addresss */
-		memcpy(mac_addr, mac, ETH_ALEN);
-		DBG_88E("MAC Address from efuse error, assign default one !!!\n");
+		eth_random_addr(mac_addr);
+		DBG_88E("MAC Address from efuse error, assign random one !!!\n");
 	}
 
 	DBG_88E("rtw_macaddr_cfg MAC Address  = %pM\n", (mac_addr));