1. 根目录:
2. sound
3. soc
4. mid-x86
5. Makefile

snd-soc-sst-platform-objs := sst_platform.o
snd-soc-mfld-machine-objs := mfld_machine.o

obj-$(CONFIG_SND_SST_PLATFORM) += snd-soc-sst-platform.o
obj-$(CONFIG_SND_MFLD_MACHINE) += snd-soc-mfld-machine.o