dt-bindings: dmaengine: qcom: gpi: add compatible for SM6375

Document the compatible for GPI DMA controller on SM6375 SoC.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221109111236.46003-3-konrad.dybcio@linaro.org


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