dt-bindings: mmc: sdhci-msm: add MSM8998

Add a MSM8998-specific SDCC compatible, because using only a generic
qcom,sdhci-msm-v4 fallback is deprecated.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20220714091042.22287-2-krzysztof.kozlowski@linaro.orgSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>

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

@@ -30,6 +30,7 @@ properties:
               - qcom,msm8992-sdhci
               - qcom,msm8994-sdhci
               - qcom,msm8996-sdhci
+              - qcom,msm8998-sdhci
           - const: qcom,sdhci-msm-v4 # for sdcc versions less than 5.0
       - items:
           - enum: