Remove the check of start_threshold in sw_params
Remove the check of start_threshold in sw_params

Removed the invalid check of start_threshold with period_size
in snd_pcm_sw_params().

gittup/alsa-lib,takaswie/alsa-lib,Distrotech/alsa-lib,takaswie/alsa-lib,zedongchen/alsa-lib,mikelima/alsa-lib,zedongchen/alsa-lib,mengdonglin/alsa-lib,takaswie/alsa-lib,mikelima/alsa-lib,alsa-project/alsa-lib,Distrotech/alsa-lib,Distrotech/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,lgirdwood/alsa-lib,alsa-project/alsa-lib,mikelima/alsa-lib,lgirdwood/alsa-lib,gittup/alsa-lib,mikelima/alsa-lib,gittup/alsa-lib,takaswie/alsa-lib,mengdonglin/alsa-lib,alsa-project/alsa-lib,tiwai/alsa-lib,lgirdwood/alsa-lib,tiwai/alsa-lib,zedongchen/alsa-lib,alsa-project/alsa-lib,lgirdwood/alsa-lib,Distrotech/alsa-lib,mengdonglin/alsa-lib,mikelima/alsa-lib,gittup/alsa-lib,mengdonglin/alsa-lib,lgirdwood/alsa-lib,takaswie/alsa-lib,Distrotech/alsa-lib,zedongchen/alsa-lib,mengdonglin/alsa-lib,zedongchen/alsa-lib