clang-19: fix readability-static-accessed-through-instance warning

Fix two errors such as these:
```
../ssifbridged.cpp:187:36: error: static member accessed through instance [readability-static-accessed-through-instance,-warnings-as-errors]
  187 |         ((prevReqCmd.netfn + 1) << ssifchannel->netFnShift) |
      |                                    ^
../ssifbridged.cpp:187:36: note: member base expression may carry some side effects
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6f3ed515442949b170a6ee8291e58f3ef769565b
1 file changed