Ubuntu Mate - Pi 3 - NFC 1.7.1

Question

I plug my pn532 NFC V3 in my Pi, I use this Scheme https://i.stack.imgur.com/deOfX.jpg

I'm using a Ubuntu Mate 16.04, I follow this steps:

Plug the board. Change this file /boot/config.txt

dtoverlay=pi3-disable-bt
enable_uart=1

Change /boot/cmdline.txt

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait quiet splash

Reboot all Install NFC Tools - https://learn.adafruit.com/adafruit-nfc-rfid-on-raspberry-pi/building-libnfc

And, nothing works!

root@pi3:~# nfc-list
nfc-list uses libnfc 1.7.1
No NFC device found.

Someone, can you help me?

Thanks