arm64: dts: qcom: sm6350: Add UFS nodes

Add the necessary nodes for UFS and its PHY.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220321133318.99406-6-luca.weiss@fairphone.com