taoshan: Moar bootspeed!

 * Use the noop I/O scheduler while booting.
   This dramatically improves the bootup time. Noop is ideal
   for high-throughput applications on non-rotating storage, but
   is not designed for interactive usage like ROW or CFQ.

Change-Id: Icff238fe5b3328b0525ade84d9905d45945fc679