[PATCH] bloblist: Describe the design goals

[Simon Glass]

Add a comment explaining the design goals of bloblist, to make it easier
for people to understand and comment on the structure.

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

 doc/develop/bloblist.rst |  2 ++
 include/bloblist.h       | 62 ++++++++++++++++++++++++++++++++++++++--
 2 files changed, 62 insertions(+), 2 deletions(-)

Applied to u-boot-dm, thanks!