drivers: sensor: mcux_acmp: update dts binding and adapt driver

Update the devicetree binding for the nxp,kinetis-acmp comparator and
move the binding to dts/bindings/comparator.

The update to the binding includes:
- Remove unused io-channel-cells property
- Remove unused sensor-device include
- Adding missing properties dac config, discrete mode config, and
  input configs.
- Rename properties to exclude redundant vendor prefix since props in
  this binding are not inhereted, and as such, don't need to be
  namespaced.
- Deprecate the old names of the renamed properties

The sensor based device driver has been updated to support both the
deprecated and new property names. This allows it to use both
nxp,enable-sample and filter-enable-sample for example.

Additionally, remove the unused io-channel-cells properties from
in-tree nodes of compatible = "nxp,kinetis-acmp"

Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>