msm: pil: Fix segment physical address comparison

The PIL must load segments in order of lowest physical address
to highest physical address.  The comparison used to sort the
segment list prior to load is replaced with one that works
for physical addresses above 2GB (0x80000000).  The previous
comparison returned an incorrect result when comparing a
segment with a physical address located below 2GB with one located
above 2GB.

Change-Id: Id648959a1619ad0a7bb7f8f78e1f7164b3693fb6
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>