soc: qcom: pil-msa: Set the strongly-ordered attribute on DMA allocations

To completely eliminate the possibility of speculative
accesses on DMA memory, set the strongly-ordered attribute
on all such allocations.

Change-Id: I4bad68eeae33aaebb4b1a30ab7a0ba133c6a0343
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>