arm64: dts: qcom: sm8150: use proper DSI PHY compatible

arm64: dts: qcom: sm8150: use proper DSI PHY compatible

The DSI PHY on the Qualcomm SM8150 platform requires platform-specific
handling. Use the proper SoC-specific compatible string for the DSI
PHYs.

Reported-by: Degdag Mohamed <degdagmohamed@gmail.com>
Fixes: 2ef3bb17c45c ("arm64: dts: qcom: sm8150: Add DISPCC node")
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230612031623.3620155-1-dmitry.baryshkov@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>