Hello!

There is only one usage example of the 'namevaluevarstore' storage in
the edk2 codebase
(https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Universal/DriverSampleDxe/Vfr.vfr).
And in this driver this storage is used only by the `numeric` VFR elements.
Is it possible to use `namevaluevarstore` storage with other VFR elements?
I've tried to use it with the `checkbox` element, but in this case
build fails with an error:
```
ERROR 12288: CheckBox varid doesn't support array
```

Best regards,
Konstantin Aladyshev