[PATCH v4 32/42] dm: doc: Tidy up of-platdata docs

[Simon Glass]

This doc has a few pieces that are out-of-date. Fix these. Also we have
started to use 'devicetree' instead of 'device tree' or 'device-tree'
since it is easier to see as a single term, so replace all ocurrences
accordingly.

Also move the caveats to the end, since this is a fairly solid part of
U-Boot now.

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

(no changes since v3)

Changes in v3:
- Add documentation updates

 doc/driver-model/of-plat.rst | 138 +++++++++++++----------------------
 1 file changed, 52 insertions(+), 86 deletions(-)

Applied to u-boot-dm/next, thanks!