git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6854 6f19259b-4bc3-4df7-8a09-765794883524
2. Clean BasePeCoff library instance, only keep one copy PeCoffLoaderEx.c file for IA32, X64 and IPF arch 3. Clean the confused comments git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5927 6f19259b-4bc3-4df7-8a09-765794883524