ASoC: Revert widget I/O locking for 3.4

The widget locking depends on some of the other locking changes which
are queued up for 3.5 not 3.4 so revert the locking changes and reapply
them in 3.5.

This reverts commit 66bf9321 and
96acc357.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>