dt-bindings: arm: stm32: Add Engicam i.Core STM32MP1 C.TOUCH 2.0 10.1" OF

i.Core STM32MP1 is an EDIMM SoM based on STM32MP157A from Engicam.

C.TOUCH 2.0 is a general purpose carrier board with capacitive
touch interface support.

10.1" OF is a capacitive touch 10.1" Open Frame panel solutions.

i.Core STM32MP1 needs to mount on top of C.TOUCH 2.0 carrier with
pluged 10.1" OF for creating complete i.Core STM32MP1 C.TOUCH 2.0
10.1" Open Frame board.

Add bindings for it.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>