ALSA: hda - add hdmi_pcm to manage hdmi pcm related features

Use struct hdmi_pcm wrapper for hdmi pcm management.
All PCM related features, like jack,  will be put in this structure.

Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>