ASoC: Intel: Add stream direction for pcm-module map

A DAI may have 2 streams(playback/capture) and different modules
may be needed for them respectively, so we need add a stream
direction here, the combination(dai_id + stream) can tell us
which module we really need here.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>