ASoC: Implement DAI links in a list & some code refactoring

From: Mengdong Lin <[email protected]>

This is still a preparation for topology to create PCM at dynamically.

First two patches are code refactoring.

The 3rd patch implements the DAI links into a list, so that the number of links can add/shrink by topology at runtime.
The use scenario may be like this:
- When instantiating the soc card, probing a component with topology can bring new DAI links. The ASoC will probe the new links (in later patches).
- When unregistering the soc card, removing this component will also remove DAI links created by it.

For backward compatiblity, the machine driver can still define a static link array. And the ASoC core will add these links into the list when instantiating the soc card.

Mengdong Lin (3):
ASoC: Define soc_init_dai_link() to wrap link intialization.
ASoC: Change 2nd argument of soc_bind_dai_link() to DAI link pointer
ASoC: Implement DAI links in a list & define API to add/remove a link

 include/sound/soc.h  |  15 ++-
 sound/soc/soc-core.c | 251 +++++++++++++++++++++++++++++++++------------------
 2 files changed, 177 insertions(+), 89 deletions(-)

2.5.0