Pass suspend delay description to power manager.

This passes a short human-readable string ("wimax-manager")
to powerd when registering a suspend delay to aid in
debugging.

BUG=chromium-os:36980
TEST=confirmed that description appears in powerd log
CQ-DEPEND=I661570a23b42f3fba892671edc730ffe5584f35a

Change-Id: Id81a3f8ba22bbbb91c4c2099d3202eccb3678c1a
Reviewed-on: https://gerrit.chromium.org/gerrit/41938
Tested-by: Daniel Erat <derat@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Daniel Erat <derat@chromium.org>
2 files changed