sound: Import latest code from FreeBSD
* As of
1bac48ea8f21c4121f1c45311ec4f05577c58abc (SVN id r275101)
"Add bunch of PCI IDs of Intel Wildcat Point (9 Series) chipsets."
* Do not import isa, macio, sbus and usb drivers
* snd_au88x0 has been removed. According to the FreeBSD commit message, it
never even got compiled into the kernel or as a module.
* Drop the ds1, csa and maestro3 drivers due to restrictive license terms
or the need to use binary blobs. These drivers are not built by default
on FreeBSD.