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.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>