The cursor save_data buffer is allocated when the cursor is enabled but
never freed. Add a pre_remove callback to free this buffer when the
vidconsole device is removed.
Fixes: aebedeac44 ("video: Provide a buffer to hold pixels behind the cursor")
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
9c19a957d3