devcietree: bindings: add some MFD Keymile FPGAs

These are the bindings for 2 MFD devices used on some of the Keymile boards.
The first one is the chassis managmenet bfticu FPGA.
The second one is the board controller (reset, LEDs, GPIOs) QRIO CPDL.
These FPGAs are used in the kmcoge4 board.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>