soc: qcom: mem-offline: add support for multiple size pasr segments

When the PASR segment size is not equal to the memblock size,
we need to bundle the multiple online/offline request on that segment
into one. Add support for it.

Change-Id: I663ae774ec66b864d4dc13c317fed97e7ccdfd08
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>