dt-bindings: arm: qcom: Add compatible for SA8155p-adp board

SA8155p-adp board is based on Qualcomm Snapdragon sa8155p
SoC which is similar to the sm8150 SoC.

Add support for the same in dt-bindings.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Link: https://lore.kernel.org/r/20210615074543.26700-5-bhupesh.sharma@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>