ASoC: DAPM: Make sure DAPM widget IO ops hold the component mutex

Currently not all DAPM widget IO ops are holding their component mutex
(codec or platform). Make sure this is now held for DAPM widget IO operations.

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