staging: comedi: ni_mio_common: handle_a_interrupt() does not need ai_mite_status

This function only handles the analog input interrupts, the dma was already
handled.

Remove the unecessary parameter and fix ni_E_interrupts() so that the comedi
events are properly handled.

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>