dt-bindings: hwmon: ibm,cffps: move to trivial devices

The IBM Common Form Factor Power Supply Versions 1 and 2 bindings are
trivial, so they can be integrated into trivial devices bindings.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210921102832.143352-3-krzysztof.kozlowski@canonical.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>