Claude review: drm/panel: visionox-rm69299: Move power_on/off into prepare/unprepare

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

Patch Review

A clean simplification. After patch 1, `prepare` just called `power_on` and `unprepare` just called `power_off`, so inlining them is the right call.

One minor reverse-christmas-tree nit in the new `prepare`:

```c
static int visionox_rm69299_prepare(struct drm_panel *panel)
{
	int ret;
	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
```

Kernel convention puts longer declarations first. This should be:

```c
	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
	int ret;
```

Also, the diff removes a blank line between the error check and the subsequent block comment:

```c
	if (ret < 0)
		return ret;
	/*
	 * Reset sequence of visionox panel requires the panel to be
```

The original had a blank line separating those, which aided readability. Very minor.

No functional issues.

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Generated by Claude Code Patch Reviewer