Add Alessa plug my own plug

PS8: bump to 2.1 allow support for bacon freqs [I hope it work great coz i don't have it]

Change-Id: I95f7a6068dbdbb1a8dc8abac4c6d7e3282acb3b5
Signed-off-by: klozz <xxx.reptar.rawrr.xxx@gmail.com>