Comment # 18 on bug 1009674 from Takashi Iwai

OK, now I tried to backport the upstream commit 8581f1b5ee08.

The test kernel is being built in OBS home:tiwai:bnc1009674 repo.  It takes
some time (1 or 2 hours, usually) until the package is built and published. 
Please give it a try later.  Once when it's confirmed to work, I'll merge the
patch to SLE12-SP2 / openSUSE-42.2 branch.