To support UEFI Secure Boot and the Linux persistent store with UEFI
variables, set PcdMaxVariableSize to 0x2000 bytes as is done in OvmfPkg.
For reference, the related Ovmf commits: 8cee3de72d441ca9
Also increase the maximum size for Authenticated variables in order to
handle a larger Signature List size as is done in OvmfPkg. Related Ovmf
commit: f5404a3e
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Linn Crosetto <linn@hpe.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>