need dev/block/board_info and dev/block/mfg please

[sonVNCb]

hello guys i need two files dev/block/board_info and dev/block/mfg for my U11 please.
adb shell "dd if=/dev/block/bootdevice/by-name/board_info of=/sdcard/board_info.img"
adb shell "dd if=/dev/block/bootdevice/by-name/mfg of=/sdcard/mfg.img"
thanks so much.