arm64: dts: qcom: sm8150-mtp: Specify remoteproc firmware

Point the various remoteprocs of SM8150 MTP to a place with the platform
specific firmware.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20201121055603.582281-1-bjorn.andersson@linaro.org


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