Update minor comments for Smbus, PcdLib, PeiServicesLib library instance. And change UefiRuntimeLib instance type to UEFI_DRIVER according to MdeLib spec.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6495 6f19259b-4bc3-4df7-8a09-765794883524
5 files changed