dt-bindings: mmc: sdhci-msm: allow dma-coherent

SM8350, SM8450 and SM8550 SDHCI controllers for SD card are marked with
dma-coherent, so allow it.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221204094717.74016-5-krzysztof.kozlowski@linaro.orgSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/sdhci-msm.yaml

@@ -83,6 +83,8 @@ properties:
       - const: cal
       - const: sleep
 
+  dma-coherent: true
+
   interrupts:
     maxItems: 2