dt-bindings: dma: gpi: Document SM6125 compatible

Document compatibility for this GPI DMA controller on SM6125.

Signed-off-by: Martin Botka <martin.botka@somainline.org>
[Marijn: Move compatible to the list with qcom,sdm845-gpi-dma]
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221222194600.139854-2-marijn.suijten@somainline.org


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