ASoC: pcm: update the start-up sequence for playback

Codec should be started before the CPU to ensure that there is no data
loss during playback.Current sequence enables the CPU first followed by
codec.This change updates the sequence prevent any playback data loss.

Also, squash the below change to fix possible NULL pointer dereference
issue

ASoC: pcm: Check for capture path in all codec_dais

During soc_pcm_prepare, check for capture path for all
the codec_dais instead of the last codec_dai. This is
will help to set pcm start event for all the codec dais
that has capture_active set to high. Change checks for
all the codec_dais capture_active bit to set start stream
event.

Change-Id: I3f1b457ecd169f6ecc42e15f2151ede9cdbd580d
Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Meng Wang <mwang@codeaurora.org>