dt-bindings: arm: Add entry for Beckhoff CX9020
- add vendor prefix bhf for Beckhoff
- add new board binding bhf,cx9020
Signed-off-by: Patrick Bruenn <p.bruenn@beckhoff.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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