SOF admin

Given the size of the project, maintainer rights are granted to multiple contributors:

Intel	Lech Betlej	@lbetlej
Intel	Liam Girdwood	@lgirdwood
Intel	Marcin Maka	@mmaka1
Intel	Pierre Bossart	@plbossart
Intel	Ranjani Sridharan	@ranj063
NXP	Daniel Baluta	@dbaluta

Administrators may override specific merge rules, for example merge a PR even if it does not meet all criteria defined by a repository, but will only do so for exceptional cases.

Administrators can add new contributors to the project, define their contributor levels and assign them to specific teams.