AuthVariableLib library can be used by MM_STANDALONE drivers as well.
So add MM_STANDALONE to the list of module types this library supports.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jagadeesh Ujja <jagadeesh.ujja@arm.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
