staging: comedi: addi_apci_3120: absorb apci3120_interrupt_handle_eos()

Absorb this simple function into apci3120_interrupt().

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>