read-encfile.py: minor cleanup, commenting
read-encfile.py: minor cleanup, commenting

Change-Id: I8ff4432c3541d48d45d8dcd8dbf4521e2cd88c0e
(cherry picked from commit c9283d7f25460e3d73154d2c474929b3e3d29971)

intelxed/xed,intelxed/xed,intelxed/xed,intelxed/xed