pcm: plug: add SND_PCM_FORMAT_{S, U}20 to linear_preferred_formats
pcm: plug: add SND_PCM_FORMAT_{S, U}20 to linear_preferred_formats

This commit adds the recently added formats SND_PCM_FORMAT_{S,U}20 to
the linear_preferred_formats array in pcm_plug.
Let's give them lower priority than more standard S24 formats but a higher
priority than less typical 3-byte versions.

Signed-off-by: Maciej S. Szmigiero <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@maciej.szmigiero.name>
Reviewed-by: Takashi Sakamoto <d5ec7d0cd8074757a1f5eb708bc105c3065a65ea@sakamocchi.jp>
Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

alsa-project/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,takaswie/alsa-lib,takaswie/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,takaswie/alsa-lib,takaswie/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,takaswie/alsa-lib,alsa-project/alsa-lib