use USB_SUBCLASS_AUDIOSTREAMING constant from usb/audio.h
instead of 0x02
Cc: Mike Thomas <rmthomas@sciolus.org> Cc: Dan Carpenter <error27@gmail.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>