Deprecating ISA sound cards

From: Ed Maste <>
Date: Fri, 18 Mar 2022 16:08:02 UTC
ISA sound cards have been obsolete for more than a decade, and it is
(past) time to retire their drivers. This includes the following

snd_ad1816  Analog Devices AD1816 SoundPort
snd_ess     Ensoniq ESS
snd_gusc    Gravis UltraSound
snd_mss     Microsoft Sound System
snd_sbc     Creative Sound Blaster

I have a review open to add deprecation notices:

I expect to commit this in the near future, then MFC to stable
branches and remove these drivers from main. Please follow up if
there's a reason we should postpone the removal of any of these