Clean up: Function abstraction in password file

Abstracted verifyPassword function in password source file
to make it more readable by creating a new function named
verifyIntegrityCheck.

Tested:
No oob-bios functionality impact.

Change-Id: Id500b824f8d99b28c580ceb244f4a0114060e57e
Signed-off-by: Smriti-Ayushi <smriti.ayushi@linux.intel.com>
2 files changed