dm: sandbox: Enable all partition types

It is useful to have sandbox build as much code as possible to avoid having
to build every board to detect build errors. Also we may add tests for some
more partition types at some point.

Enable all partition types in sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>