dt-bindings: dma: qcom: gpi: add fallback compatible

The drivers are transitioning from matching against lists of specific
compatible strings to matching against smaller lists of more generic
compatible strings. Use the SDM845 compatible string as a fallback in
the schema to support this change.

Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221018005740.23952-2-mailingradian@gmail.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>