cellSaveData: Pass flags 0 for the functions without userdata #19910

Analysis, hwtest and fixes made by Opus 5.5. Tested by me.

Bug: The six functions without userdata (ListSave, ListLoad, FixedSave, FixedLoad, AutoSave, AutoLoad) get flags 0 from the firmware, but RPCS3 passed 2. As a result, RPCS3 adds the 35 KB of sysSizeKB to their sizeKB and accepts a NULL funcFile. A PS3 does neither.

Fix: These six functions pass flags 0. sizeKB only includes sysSizeKB when flag 0x2 is set.

Results (hwtest on the same save):

syssizekb_hwtest.zip

  ┌──────────────────────────────────┬──────────┬────────────┬────────────┐

  │                                  │ upstream │  this PR   │    PS3     │

  ├──────────────────────────────────┼──────────┼────────────┼────────────┤

  │ sizeKB, the six functions        │ 53       │ 18         │ 18         │

  ├──────────────────────────────────┼──────────┼────────────┼────────────┤

  │ sizeKB, the other 17             │ 53       │ 53         │ 53         │

  ├──────────────────────────────────┼──────────┼────────────┼────────────┤

  │ NULL funcFile, the six functions │ 0*       │ 0x8002b404 │ 0x8002b404 │

  ├──────────────────────────────────┼──────────┼────────────┼────────────┤

  │ NULL funcFile, the "2" variants  │ 0*       │ 0          │ 0          │

  └──────────────────────────────────┴──────────┴────────────┴────────────┘

• From the code, not run. The output of this PR is identical to the PS3 output on every row.