dt-bindings: arm: add compatible for Forlinx OKA40i-C and FETA40i-C

The FETA40i-C is a SoM by Forlinx based on the Allwinner R40/A40i SoC.
The OKA40i-C is a carrier/development board by the same company based on
this SoM.

This patch adds compatible strings for these two devices in preparation for
the next patch containing a devicetree for them.

Signed-off-by: Ivan Uvarov <i.uvarov@cognitivepilot.com>

 1 file changed, 6 insertions(+)

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210407111428.3755684-5-i.uvarov@cognitivepilot.com