ASoC: cs35l41: Binding fixes

Fix warnings and errors in DT bindings

Add newline at end of file
Replace 'unevaluatedProperties' with 'additionalProperties'
Add spi context to DT example
Add #sound-dai-cells to DT example
Rename to 'cirrus,cs35l41.yaml'

Signed-off-by: David Rhodes <drhodes@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210915191422.2371623-1-drhodes@opensource.cirrus.com


Signed-off-by: Mark Brown <broonie@kernel.org>