ASoC: fsl: Add missing pm to current machine drivers

Add missing pm to current machine drivers so that all of them would
correctly do suspend/resume.

Signed-off-by: Nicolin Chen <b42378@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc sound/soc/fsl/imx-mc13783.c
Simple merge

diff --cc sound/soc/fsl/imx-sgtl5000.c
Simple merge

diff --cc sound/soc/fsl/imx-wm8962.c
Simple merge