Comment # 6 on bug 1191417 from Takashi Iwai

I pushed the temporary fix to correct MODULE_FIRMWARE() versions to match with
the existing firmware file on both stable and SLE15-SP4 branches.  This should
make it working once after the installer image gets rebuilt with that.

For a long-term solution, I guess we need to extend the syntax somehow.  I have
no good idea how to represent such a case, though; a normal wildcard doesn't
fit well, as we want only a single file for fallback, after all.