dt-bindings: mmc: sdhci-msm: add sdm670 compatible

The Snapdragon 670 supports eMMC with an SDHCI controller. Add the
appropriate compatible to the documentation.
Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Reviewed-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220923014322.33620-2-mailingradian@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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

@@ -38,6 +38,7 @@ properties:
               - qcom,sc7180-sdhci
               - qcom,sc7280-sdhci
               - qcom,sdm630-sdhci
+              - qcom,sdm670-sdhci
               - qcom,sdm845-sdhci
               - qcom,sdx55-sdhci
               - qcom,sdx65-sdhci