Align with recent cfg80211 header (#63)

Starting from Linux v6.7, several significant changes have been made to
the cfg80211 subsystem.
1. The scan_width field is no longer present in the cfg80211_inform_bss
   structure. There really is not any support for scanning at different
   channel widths than 20 MHz since there is no way to set it.
2. The parameters in the change_beacon function have been updated to
   cfg80211_ap_update. The change_beacon function now includes two
   additional parameters, fils_discovery and unsol_bcast_probe_resp.
   These two additional parameters are part of the cfg80211_ap_update
   structure.

vwifi.c

@@ -454,7 +454,9 @@ static void inform_bss(struct vwifi_vif *vif)
         struct cfg80211_inform_bss data = {
             /* the only channel */
             .chan = &ap->wdev.wiphy->bands[NL80211_BAND_2GHZ]->channels[0],
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
             .scan_width = NL80211_BSS_CHAN_WIDTH_20,
+#endif
             .signal = DBM_TO_MBM(rand_int_smooth(-100, -30, jiffies)),
         };
         int capability = WLAN_CAPABILITY_ESS;
@@ -529,7 +531,7 @@ static enum hrtimer_restart vwifi_beacon(struct hrtimer *timer)
         .boottime_ns = ktime_get_boottime_ns(),
         .chan = vif->channel,
     };
-
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
     switch (vif->bw) {
     case NL80211_CHAN_WIDTH_5:
         bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_5;
@@ -541,7 +543,7 @@ static enum hrtimer_restart vwifi_beacon(struct hrtimer *timer)
         bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_20;
         break;
     }
-
+#endif
     int capability = WLAN_CAPABILITY_ESS;
 
     if (vif->privacy)
@@ -1580,7 +1582,12 @@ static int vwifi_stop_ap(struct wiphy *wiphy, struct net_device *ndev)
 
 static int vwifi_change_beacon(struct wiphy *wiphy,
                                struct net_device *ndev,
-                               struct cfg80211_beacon_data *info)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 7, 0)
+                               struct cfg80211_ap_update *info
+#else
+                               struct cfg80211_beacon_data *info
+#endif
+)
 {
     struct vwifi_vif *vif = ndev_get_vwifi_vif(ndev);
     int ie_offset = DOT11_MGMT_HDR_LEN + DOT11_BCN_PRB_FIXED_LEN;
@@ -1591,15 +1598,23 @@ static int vwifi_change_beacon(struct wiphy *wiphy,
      * 2. tail: beacon IEs after TIM IE
      * We combine them and store them in vif->beacon_ie.
      */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 7, 0)
+    head_ie_len = info->beacon.head_len - ie_offset;
+    tail_ie_len = info->beacon.tail_len;
+#else
     head_ie_len = info->head_len - ie_offset;
     tail_ie_len = info->tail_len;
-
+#endif
     if (likely(head_ie_len + tail_ie_len <= IE_MAX_LEN)) {
         vif->beacon_ie_len = head_ie_len + tail_ie_len;
         memset(vif->beacon_ie, 0, IE_MAX_LEN);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 7, 0)
+        memcpy(vif->beacon_ie, &info->beacon.head[ie_offset], head_ie_len);
+        memcpy(vif->beacon_ie + head_ie_len, info->beacon.tail, tail_ie_len);
+#else
         memcpy(vif->beacon_ie, &info->head[ie_offset], head_ie_len);
         memcpy(vif->beacon_ie + head_ie_len, info->tail, tail_ie_len);
-
+#endif
         pr_info(
             "%s: head_ie_len (before TIM IE) = %d, tail_ie_len = "
             "%d",
@@ -2550,7 +2565,9 @@ static void vwifi_virtio_mgmt_rx_scan_response(
     };
     struct cfg80211_inform_bss data = {
         .chan = &rx_channel,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
         .scan_width = NL80211_BSS_CHAN_WIDTH_20,
+#endif
         .signal = DBM_TO_MBM(rand_int_smooth(-100, -30, jiffies)),
     };