dt-bindings: dmaengine: qcom: gpi: add compatible for sm8250

No functional changes, just adding a new compatible for a different
SoC.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210614235358.444834-1-konrad.dybcio@somainline.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/dma/qcom,gpi.yaml

@@ -21,6 +21,7 @@ properties:
     enum:
       - qcom,sdm845-gpi-dma
       - qcom,sm8150-gpi-dma
+      - qcom,sm8250-gpi-dma
 
   reg:
     maxItems: 1