This interface allows to use different mechanism to store the HobList Pointer.
EmbeddedPkg/PrePiHobListPointerLib: Implementation of PrePiHobListPointerLib using PCD
This library uses a PCD to store the location of the HobList Pointer.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11947 6f19259b-4bc3-4df7-8a09-765794883524