Claude review: gpu: nova-core: do not import firmware commands into GSP command module

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

Good namespace hygiene change. Replacing `use fw::commands::*` with `use fw::self` makes the origin of each type clear.

```rust
-    fw::{
-        commands::*,
+    fw::{
+        self,
```

The pattern of using `Self::Command::init(...)` instead of repeating the type name is a nice touch:

```rust
-        GspSetSystemInfo::init(self.pdev)
+        Self::Command::init(self.pdev)
```

Clean, no issues.

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Generated by Claude Code Patch Reviewer