Comment # 4 on bug 1000304 from Takashi Iwai

I checked through patches:

- 6059f71f1e94 and 7616ac70d1bb can be dropped.
  These add just a new Kconfig and a new module option, and we use the default
in anyway.

- e89b8081327a and d4d03f74a73f can be dropped.
  These are fixes for bb646cdb12e75d82258c2f2e7746d5952d3e321a, and it's since
4.5 kernel.