ALSA: line6: Split to each driver

Split to each individual driver for POD, PODHD, TonePort and Variax
with a core LINE6 helper module.  The new modules follow the standard
ALSA naming rule with snd prefix: snd-usb-pod, snd-usb-podhd,
snd-usb-toneport and snd-usb-variax, together with the corresponding
CONFIG_SND_USB_* Kconfig items.

Tested-by: Chris Rorvick <chris@rorvick.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --cc sound/usb/Makefile
Simple merge

diff --cc sound/usb/line6/Kconfig
Simple merge

diff --cc sound/usb/line6/Makefile
Simple merge

diff --cc sound/usb/line6/audio.c
Simple merge

diff --cc sound/usb/line6/capture.c
Simple merge

diff --cc sound/usb/line6/driver.c
Simple merge

diff --cc sound/usb/line6/driver.h
Simple merge

diff --cc sound/usb/line6/midi.c
Simple merge

diff --cc sound/usb/line6/pcm.c
Simple merge

diff --cc sound/usb/line6/playback.c
Simple merge

diff --cc sound/usb/line6/pod.c
Simple merge

diff --cc sound/usb/line6/pod.h
Simple merge

diff --cc sound/usb/line6/podhd.c
Simple merge

diff --cc sound/usb/line6/podhd.h
Simple merge

diff --cc sound/usb/line6/toneport.c
Simple merge

diff --cc sound/usb/line6/toneport.h
Simple merge

diff --cc sound/usb/line6/variax.c
Simple merge

diff --cc sound/usb/line6/variax.h
Simple merge