staging: comedi: ni_670x: removve unused 'ao_bits'
authorH Hartley Sweeten <hartleys@visionengravers.com>
Sat, 30 Jun 2012 00:41:47 +0000 (17:41 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 6 Jul 2012 22:46:07 +0000 (15:46 -0700)
All the NI 670x boards have 16-bit anaolog output DACs. The
'ao_bits' in the boardinfo is not used so remove it.

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>

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