Claude review: gpu: ipu-v3: clean up kernel-doc warnings

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

Patch Review

No functional issues. All changes are kernel-doc comment fixes that address the specific warnings listed in the commit message.

> +	/* private: */
>  	/* internal to image converter, callers don't touch */
>  	struct list_head list;

Correct use of the `/* private: */` kernel-doc annotation to suppress the warning about undocumented `list` member.

> - * ipu_image_convert_cb_t - conversion callback function prototype
> + * typedef ipu_image_convert_cb_t - conversion callback function prototype

Correct fix. Kernel-doc requires `typedef` for typedef documentation.

> - * Returns 0 if the formats and rotation mode meet IPU restrictions,
> + * Returns: 0 if the formats and rotation mode meet IPU restrictions,

Correct. Kernel-doc expects `Returns:` with a colon.

> - * Returns an opaque conversion context pointer on success, error pointer
> + * In V4L2, drivers should call ipu_image_convert_prepare() at streamon.
> + *
> + * Returns: an opaque conversion context pointer on success, error pointer
>   * on failure. The input/output formats and rotation mode must already meet
>   * IPU retrictions.
> - *
> - * In V4L2, drivers should call ipu_image_convert_prepare() at streamon.

This moves the `In V4L2` note before `Returns:` so the return value documentation appears last. This is the correct kernel-doc convention -- `Returns:` should be the final section. One minor note: the pre-existing typo "retrictions" (should be "restrictions") survives this patch, but fixing it is outside the scope of a doc-format cleanup.

> + * Returns: 0 on success or -errno on error.

> + * Returns: pointer to the created &struct ipu_image_convert_run that has
> + * been queued on success; an ERR_PTR(errno) on error.

Both additions are accurate descriptions matching the function signatures and existing documentation prose.

No issues found. The patch is a clean documentation fix that addresses all seven kernel-doc warnings listed in the commit message.

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