dt-bindings: arm: qcom: Add compatible for sm8150-mtp board

sm8150-mtp board is based on Qualcomm Snapdragon 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/20210615074543.26700-4-bhupesh.sharma@linaro.org


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