staging: comedi: cleanup comedi usb drivers

Use the module_comedi_usb_driver helper macro to remove the module init/exit boilerplate. And refactor the init code to follow the style of the other comedi driver types and improve maintainability.

H Hartley Sweeten (8):
staging: comedi: usbdux: use module_comedi_usb_driver()
staging: comedi: usbduxfast: use module_comedi_usb_driver()
staging: comedi: usbduxsigma: use module_comedi_usb_driver()
staging: comedi: vmk80xx: use module_comedi_usb_driver()
staging: comedi: vmk80xx: refactor init code
staging: comedi: usbduxsigma: refactor init code
staging: comedi: usbduxfast: refactor init code
staging: comedi: usbdux: refactor init code

 drivers/staging/comedi/drivers/usbdux.c      | 516 +++++++++++++--------------
 drivers/staging/comedi/drivers/usbduxfast.c  | 366 +++++++++----------
 drivers/staging/comedi/drivers/usbduxsigma.c | 477 ++++++++++++-------------
 drivers/staging/comedi/drivers/vmk80xx.c     | 107 +++---
 4 files changed, 665 insertions(+), 801 deletions(-)

1.7.11