staging: comedi: ni_at_a2150: use cfc_handle_events()
Use the comedi_fc helper function to automatically call the subdevice
(*cancel) function when needed and call comedi_event().
Also, remove the clearing of the events, comedi_event() does that.
In the Kconfig, COMEDI_NI_AT_A2150 already selects COMEDI_FC.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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