Comment # 2 on bug 1209449 from Takashi Iwai

Realtek people confirmed a regression and submitted the revert to
linux-firmware tree:
  https://lore.kernel.org/all/df1ce994-3368-a57e-7078-8bdcccf4a1fd@gmail.com

So just keep your workaround for now.  I'm going to update the package later,
too.