lanefu: at last my image ready 
:/mnt/lib/firmware$ ls -l
total 560
-rw-rw-r-- 1 root root 563104 Sep 18 06:41 bootsplash.armbian
-rw-r--r-- 1 root root   4032 May 18  2018 regulatory.db
-rw-r--r-- 1 root root   1182 May 18  2018 regulatory.db.p7s