AP: Add configuration option to specify the desired MLD address

Add mld_addr configuration option to set the MLD MAC address.
The already existing bssid configuration option can be used to
control the AP MLD's link addresses.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Manaswini Paluri <quic_mpaluri@quicinc.com>

src/ap/ap_config.h

@@ -944,6 +944,9 @@ struct hostapd_bss_config {
 
 	/* The MLD ID to which the AP MLD is affiliated with */
 	u8 mld_id;
+
+	/* The AP's MLD MAC address within the AP MLD */
+	u8 mld_addr[ETH_ALEN];
 #endif /* CONFIG_IEEE80211BE */
 };