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

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

Patch Review

**File:** `drivers/gpu/nova-core/gsp/commands.rs`

Changes `fw::{commands::*, MsgFunction}` to `fw::{self, MsgFunction}` and qualifies all former wildcard-imported types with `fw::commands::`. Also switches several direct type references to `Self::Command::` where applicable (e.g., `GspSetSystemInfo::init(...)` becomes `Self::Command::init(...)`).

This is purely a namespace hygiene change. The commit message explains the motivation well: the wildcard import made it ambiguous which layer (fw vs. GSP) a command type belonged to, and prevented creating GSP-level commands with the same name as their firmware counterparts — which is exactly what patch 4 does with `UnloadingGuestDriver`.

The `Self::Command::` pattern is idiomatic and reduces coupling.

No issues.

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