PNOR: Mount ubi volumes on BMC reboot

- Create a static service file that will be
  run on all BMC boot to remount the ubi volumes.
- Read the ubinfo for all available volumes from
  obmc/flash-bios script.
- Re-Mount the available volumes on /media/ dir
  using the volume names.

Resolves openbmc/openbmc#1848

Change-Id: I9e336340a04f335d034438406e5f0fff9b21d1b9
Signed-off-by: Saqib Khan <khansa@us.ibm.com>
3 files changed