[PATCH 17/19] dm: devres: Add tests

[sjg at google.com]

The devres functionality has very few users in U-Boot, but it still should
have tests. Add a few basic tests of the main functions.

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

 drivers/core/devres.c |  13 +++
 include/dm/devres.h   |  20 +++++
 test/dm/Makefile      |   1 +
 test/dm/devres.c      | 178 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 212 insertions(+)
 create mode 100644 test/dm/devres.c

Applied to u-boot-dm, thanks!