Add MAINTAINERS file
Add MAINTAINERS file

Change-Id: I17831666541617209514efaa8b1fa512aa9831ca
Signed-off-by: Andrew Jeffery <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@aj.id.au>

openbmc/phosphor-objmgr,openbmc/phosphor-objmgr