Claude review: drm/mxsfb/lcdif: use dev_err_probe() consistently in lcdif_attach_bridge

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

Patch Review

Converts remaining `dev_err()` + `return` patterns to `dev_err_probe()`. One minor style note:

```c
+		if (!encoder)
+			return dev_err_probe(dev, -ENOMEM,
+					     "Failed to allocate encoder for endpoint%u\n",
+					     of_ep.id);
```

Using `dev_err_probe()` with `-ENOMEM` is slightly unusual since `-ENOMEM` is never a deferred probe case, but it's not wrong -- `dev_err_probe()` works for any error and the consistency argument is valid.

No issues.

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