soc: qcom: mdt_loader: Always invoke PAS mem_setup

After spelunking various old kernel trees no finds has been found
indicating that the PAS mem_setup call should actually be made
conditional on the image being relocatable.

Group the two PAS operations together, to facilitate splitting them out
in a following patch.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220128025513.97188-8-bjorn.andersson@linaro.org