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

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

Patch Review

**Status: Looks good**

Straightforward removal of a trivial wrapper:

```rust
-pub(crate) fn get_gsp_info(cmdq: &Cmdq, bar: &Bar0) -> Result<GetGspStaticInfoReply> {
-    cmdq.send_command(bar, GetGspStaticInfo)
-}
```

Replaced by direct call at the call site:

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

`GetGspStaticInfo` is made `pub(crate)` to support this. The wrapper added no value beyond the direct `send_command` call. Good cleanup.

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