Update include/sound/asound.h from 4.6-pre kernel uapi
Update include/sound/asound.h from 4.6-pre kernel uapi

The inclusion of <linux/*.h> is done conditionally for Linux in order
to improve portability.

Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

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