Claude review: gpu: nova-core: remove unneeded get_gsp_info proxy function

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

Patch Review

Clean and correct. Makes `GetGspStaticInfo` `pub(crate)` and replaces the `get_gsp_info()` wrapper with a direct `cmdq.send_command()` call.

```rust
-struct GetGspStaticInfo;
+pub(crate) struct GetGspStaticInfo;
```

and at the call site:

```rust
-let info = commands::get_gsp_info(&self.cmdq, bar)?;
+let info = self.cmdq.send_command(bar, commands::GetGspStaticInfo)?;
```

The removed `Bar0` import is correct since it was only needed for the proxy function's signature. No issues.

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