odroid c2 boot to 3.5 inch TFT LCD

i just buy a ordroid c2 & 3.5 inch touchscreen shield. i downloaded the armbian jessie desktop and installed on a emmc card. the system run smoothly.

i followed the instrution as following to set up the 3.5 inch touchscreen shield, but i failed.

http://odroid.com/dokuwiki/doku.php?id=en:3.5inch_lcd_shield

after load the following modules

sudo modprobe aml_i2c
sudo modprobe pwm-meson
sudo modprobe pwm-ctrl
sudo modprobe fbtft_device name=flexpfb rotate=270
sudo modprobe flexfb chip=ili9488
sudo modprobe sx865x

ls /dev/fb*
  /dev/fb0   /dev/fb1 (there is no /fb2 as the instruction!)

cat /sys/class/graphics/fb2/name
  no such file or directory!

i want to use the ordroid c2 as a portable armbian device. so i can learn linux system on my trip with bluetooth keyboard & 3.5 inch lcd.

i only need the output from the 3.5 inch lcd from boot up.

is there any friend to install the 3.5 inch lcd on odroid c2 successful?

thanks in advance for any recommendation.

Jason