platform: msm_shared: Change to read of partition entries in single buffer.

Presently partition entries are read and validated, and again
read to fill internal partition data.
This change ensure, we don't re-read partition entries instead,
use same buffer to fill that was used for validation.

Issue: SEC-2749
Change-Id: I5e272a0751fccf0ca145ee3445deaf15c8a4481a
(cherry picked from commit 07f7ca695e956d132ee002f4e14a686302891fcb)
1 file changed