DuetPkg, MdeModulePkg: Fix several enum comparions

These comparisons were not comparing an enum variable
with a member of the same enum type.

GCC 4.5 generated a warning for these comparison
operations.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10932 6f19259b-4bc3-4df7-8a09-765794883524
5 files changed