[PATCH v5 9/9] dm: core: Add documentation about device removal

[Simon Glass]

Make mention of this feature in the core documentation so people can
discover it without looking at a header file.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v4)

Changes in v4:
- Revised and updated based on discussion

 doc/driver-model/design.rst | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Applied to u-boot-dm, thanks!