Add ability to unset bit

Change-Id: I9071b4bdfc2af3a670cb037f2f84569bf7ab4e7d
Reviewed-on: http://gerrit.causes.com/37414
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>
Remove unnecessary $debug var from spec

Not sure what the intention of this is, but the spec passes without it
and there are no references to it elsewhere.

Change-Id: I890bd730a9bec3b754c60810091a6f4a92ec3d16
Reviewed-on: http://gerrit.causes.com/37415
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>