staging: comedi: pcl711: tidy up pcl711_ao_insn()
For aesthetics, rename this function to help with greps. Introduce a helper function to write the values to the analog output channel registers. Modify the defines for the D/A registers to avoid the ? : tests based on the chan number. Only the final value written needs to be saved for read back. 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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