dt-bindings: input: qcom,pm8xxx-vib: Document PM6150 compatible

dt-bindings: input: qcom,pm8xxx-vib: Document PM6150 compatible

The PM6150 vibrator module is compatible with the PMI632 vibrator
module, document the PM6150 vibrator compatible as fallback for the
PMI632 vibrator.

Signed-off-by: Jens Reidel <adrian@travitia.xyz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20240606181027.98537-2-adrian@travitia.xyz
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>