arm64: dts: qcom: sm8450: Mark UFS controller as cache coherent

The UFS controller on SM8450 supports cache coherency, hence add the
"dma-coherent" property to mark it as such.

Fixes: 07fa917a

 ("arm64: dts: qcom: sm8450: add ufs nodes")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230307153201.180626-2-manivannan.sadhasivam@linaro.org