Merge branch 'topic/usb-uac2-effect-unit' into for-next

Merging the UAC2 effect unit parser improvement.  As it's based on the
previous usb-audio driver fix, it was deviated from for-next branch.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --cc sound/core/pcm_native.c
Simple merge

diff --cc sound/usb/format.c
Simple merge

diff --cc sound/usb/mixer.c
Simple merge

diff --cc sound/usb/quirks.c
Simple merge