ASoC: davinci-mcasp: Remove long lines from suspend/resume callbacks

Move the context register storage behind of a struct and use a pointer to
it in the suspend/resume callbacks to remove the long lines.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc sound/soc/davinci/davinci-mcasp.c
Simple merge