staging: comedi: addi_apci_3501: board does not support dma

The board supported by this driver does not use dma. Remove the
unnecessary initialization of devpriv->s_EeParameters.i_Dma.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>