Add LED grouping support

This enables creating custom groups and participating LEDs so that it can later
be generated from MRW. For each of the group, a dbus object is created which
will announce LED actions.

Fixes openbmc/openbmc#550

Change-Id: I7a56d08755288dcfce45ee4c6d6b6c5e5aa454f7
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
8 files changed