code clean up for Security.h.

1. Incorrect comment style preceding _EFI_PEI_SECURITY_PPI.  The comments in the file have the format used to describe a function, and should have the format for a structure.
2.  Latest PEI CIS (0.91) indicates the param should be:
IN OUT BOOLEAN     *DeferExecution
whereas in the H file it's:
IN OUT BOOLEAN     *StartCrisisRecovery

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8719 6f19259b-4bc3-4df7-8a09-765794883524