sound fixes for 5.3-rc7 A collection of small fixes as usual: - More coverage of USB-audio descriptor sanity checks - A fix for mute LED regression on Conexant HD-audio codecs - A few device-specific fixes and quirks for USB-audio and HD-audio - A fix for (die-hard remaining) possible race in sequencer core - FireWire oxfw regression fix that was introduced in 5.3-rc1