[PATCH 03/17] dm: core: Expand the comment for DM_GET_DEVICE()

[Simon Glass]

The current documentation for this is not particularly enlightening. Add
a little more detail.

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

 include/dm/platdata.h | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

Applied to u-boot-dm, thanks!