remoteproc: qcom: pas: Add modem support for SDX55

Add remoteproc support for Hexagon modem found on the Qualcomm SDX55
platform.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210408171211.92141-1-manivannan.sadhasivam@linaro.org


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