Use timer_delete_sync for Linux 6.1.84 and above

The del_timer_sync function was renamed to timer_delete_sync in Linux
kernel version 6.1.84 as part of a naming consistency cleanup. While
del_timer_sync remains available as a backward-compatible inline
wrapper, it is discouraged for use in new code.

This commit updates the version check to KERNEL_VERSION(6, 1, 84) and
uses timer_delete_sync accordingly.

ref:
https://git.kernel.org/torvalds/c/9b13df3fb64ee95e2397585404e442afee2c7d4f
https://git.kernel.org/torvalds/c/8fa7292fee5c5240402371ea89ab285ec856c916

Author: horseface1110

vwifi.c

@@ -1974,7 +1974,11 @@ static int vwifi_delete_interface(struct vwifi_vif *vif)
 
         cancel_work_sync(&vif->ws_scan);
         cancel_work_sync(&vif->ws_scan_timeout);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 15, 0)
+        timer_delete_sync(&vif->scan_complete);
+#else
         del_timer_sync(&vif->scan_complete);
+#endif
 
         /* If there's a pending scan, call cfg80211_scan_done to finish it. */
         if (vif->scan_request) {
@@ -1985,7 +1989,11 @@ static int vwifi_delete_interface(struct vwifi_vif *vif)
         }
 
         /* Make sure that no work is queued */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 15, 0)
+        timer_delete_sync(&vif->scan_timeout);
+#else
         del_timer_sync(&vif->scan_timeout);
+#endif
         cancel_work_sync(&vif->ws_connect);
         cancel_work_sync(&vif->ws_disconnect);