Claude review: drm/tegra: tegra_drm.h: fix all uapi kernel-doc warnings

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

Patch Review

**Fix 1 & 2: Add missing struct member descriptions**

```c
 struct drm_tegra_reloc {
+	/** @cmdbuf: cmd information */
 	struct {
```

```c
 	} cmdbuf;
+	/** @target: relocate target information */
 	struct {
```

These additions are correct. The `struct drm_tegra_reloc` has kernel-doc (`/** ... */`) on the struct itself, and the nested anonymous struct members `cmdbuf.handle`, `cmdbuf.offset`, etc. are all documented, but the top-level `cmdbuf` and `target` aggregate members themselves were not. kernel-doc requires all direct struct members to be documented, so adding these one-line descriptions fixes the warnings.

Minor nit: the descriptions are somewhat terse ("cmd information", "relocate target information") — they could be slightly more descriptive (e.g., "command buffer reference" and "relocation target reference"), but this is a very minor style preference and not a blocker. The existing sub-member docs already provide the detail.

**Fix 3–6: Demote `/**` to `/*` on `#define` comments**

```c
-/**
+/*
  * Specify that bit 39 of the patched-in address should be set to switch
```

```c
-/**
+/*
  * Execute `words` words of Host1x opcodes specified in the `gather_data_ptr`
```

```c
-/**
+/*
  * Wait for a syncpoint to reach a value before continuing with further
  * commands.
```

```c
-/**
+/*
  * Wait for a syncpoint to reach a value before continuing with further
  * commands. The threshold is calculated relative to the start of the job.
```

All four are correct. `/**` signals kernel-doc format, which requires specific structured syntax (e.g., `@param:` descriptions for function parameters, or `DOC:` sections). These are free-form comments on `#define` macros, so `/*` is the appropriate style. The change silences the warnings without losing any documentation content.

**Reviewed-by: No issues found.** The patch is correct and ready to merge.

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