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
diff --git a/ssifbridged.cpp b/ssifbridged.cpp
index e503fe0..0873d0a 100644
--- a/ssifbridged.cpp
+++ b/ssifbridged.cpp
@@ -184,8 +184,8 @@
     unsigned int* t = reinterpret_cast<unsigned int*>(rsp.data());
     *t = 3;
     rsp[ssifchannel->sizeofLenField] =
-        ((prevReqCmd.netfn + 1) << ssifchannel->netFnShift) |
-        (prevReqCmd.lun & ssifchannel->lunMask);
+        ((prevReqCmd.netfn + 1) << SsifChannel::netFnShift) |
+        (prevReqCmd.lun & SsifChannel::lunMask);
     rsp[ssifchannel->sizeofLenField + 1] = prevReqCmd.cmd;
     rsp[ssifchannel->sizeofLenField + 2] = ccResponseNotAvailable;