dt-bindings: mmc: sdhci-msm: Add pinctrl-1 property

Most mmc blocks contain two pinctrls, default and sleep. But then
dt-schema complains about pinctrl-1 not being defined.
Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Link: https://lore.kernel.org/r/20220910143213.477261-6-iskren.chernev@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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

@@ -97,6 +97,10 @@ properties:
     description:
       Should specify pin control groups used for this controller.
 
+  pinctrl-1:
+    description:
+      Should specify sleep pin control groups used for this controller.
+
   resets:
     maxItems: 1