MdeModulePkg: Enable buffer type value for default and oneofoption opcode.

MdeModulePkg: Enable buffer type value for default and oneofoption opcode.

In order to support default value for orderedlist opcode, support buffer type value for default/oneofoption opcode.
If oneofoption used as a default value, it will not be added to normal option list.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17336 6f19259b-4bc3-4df7-8a09-765794883524