Do not mount /dev/md by default via udev, this resolved a problem
with the sanity test failing due to seeing the error while attempting
to mount /dev/md0
(From OE-Core rev: 07a2825c6f4ad3e5e3970cd1a89233bd795c68cf)
(From OE-Core rev: 8ea8e41ad7863f57a851f00154e133cd0e550ef8)
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>