openpower-proc-control: srcrev bump bbb53393c5..482a887804

Ramesh Iyyar (1):
      PHAL: Add new service file to indicate guard actions.

Change-Id: Ia6e029556508bebe2845be997c5f45ff9cf9f5be
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>