arm64: dts: qcom: sa8775p: mark the UFS controller as dma-coherent

The UFS controller is cache coherent, so mark it as such in the dtsi.

Fixes: be543efe ("arm64: dts: qcom: sa8775p: add UFS nodes")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Suggested-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230515121908.303432-1-brgl@bgdev.pl