[edk2-devel] OVMF: NV Variable Store Layout of Larger Build Targets

[Devon Bautista]

For reference, here is a summary of which sections increased when the 4MiB build target was added (taken from commit [`b24fca05`](https://github.com/tianocore/edk2/commit/b24fca05751f8222acf264853709012e0ab7bf49)) after the previous 2MiB limit:
```
  Description                Compression type                Size [KB]
  -------------------------  -----------------  ----------------------
  Non-volatile data storage  open-coded binary    128 ->   528 ( +400)
                               data
    Variable store                                 56 ->   256 ( +200)
    Event log                                       4 ->     4 (   +0)
    Working block                                   4 ->     4 (   +0)
    Spare area                                     64 ->   264 ( +200)

  FVMAIN_COMPACT             uncompressed        1712 ->  3360 (+1648)
    FV FFS file              LZMA compressed
      PEIFV                  uncompressed         896 ->   896 (   +0)
        individual PEI       uncompressed
          modules
      DXEFV                  uncompressed       10240 -> 10240 (   +0)
        individual DXE       uncompressed
          modules

  SECFV                      uncompressed         208 ->   208 (   +0)
    SEC driver
    reset vector code
```


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