tree ebc3274067b42a2c76cc0c055754fd74da36321c
parent fe6d12ada3a339ab84b419317c69baaa0e802901
author Simon Glass <sjg@chromium.org> 1447051671 -0700
committer Simon Glass <sjg@chromium.org> 1447990071 -0700

usb: Refactor USB tree output code for testing

Allow the 'usb tree' command to be used from test code, so that we can
verify that it works correctly.

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