Updated Get Firmware Root Certficate data command

Updated IPMI Get Firmware Root Certficate data command(0x25) for PFR

This command works only for PFR enabled platforms.

Tested:
 - Enabled INTEL_PFR_ENABLED flag and verified the below command
   ipmitool -I dbus raw 0x08 0x25
 Returns proper data.
 - Disabled INTEL_PFR_ENABLED flag and verified
   Returns error.

Signed-off-by: Rajashekar Gade Reddy <raja.sekhar.reddy.gade@linux.intel.com>
Change-Id: I8a6d0c939d26a8e8058dc35b26c6f78228ea8e5c
2 files changed