As well as any other stray instances of mic in the codebase that can
be removed.
We don't really need to carry around legacy naming, and the history is
in git.
(From OE-Core rev: 598b120406dc1d2b7e377bd1ab6f0acbef034b22)
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>