Add new interface GetVariable2 and GetEfiGlobalVariable2 to return more info. Also replace old interface with new one.

Signed-off-by: Eric Dong <[email protected]>
Reviewed-by: Liming Gao <[email protected]>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13375 6f19259b-4bc3-4df7-8a09-765794883524
20 files changed