IPC_IA_DROP_STREAM   70 sound/soc/intel/atom/sst-mfld-dsp.h #define IPC_IA_DROP_STREAM 0x26
IPC_IA_DROP_STREAM   53 sound/soc/intel/baytrail/sst-baytrail-ipc.c #define IPC_IA_DROP_STREAM	0x26