ASoC: Intel: Revert "rename pcm dias to media dai"

This reverts commit 0cac6fc3.
This comiit was dropped from rev2 and would not be required as it renames the
platform ops as well which is not required.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>