Buildroot board support for Telit EVK-PRO3 with Telit GE863-PRO3

Official site:
http://www.telit.com/en/products.php?p_id=3&p_ac=show&p=10

Build images:
make telit_evk_pro3_defconfig
make

images built:
- output/images/barebox.bin
- output/images/zImage
- output/images/rootfs.ubi

Flash built images:
The first time you need to bootstrap from Telit Official Release 221.07.1007,
at the U-Boot prompt type:
U-Boot> loadb
send buildroot/output/images/barebox.bin
U-Boot> go 0x20200000

flash updated images using barebox through tftp:
barebox:/ erase dev/self0; cp /mnt/tftp/barebox.bin /dev/self0
barebox:/ erase /dev/nand0.kernel.bb; cp /mnt/tftp/zImage /dev/nand0.kernel.bb
barebox:/ erase /dev/nand0.rootfs.bb; cp /mnt/tftp/rootfs.ubi /dev/nand0.rootfs.bb
barebox:/ erase dev/env0
barebox:/ reset