staging: comedi: me4000: only set SDF_DIFF when supported
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Wed, 5 Aug 2015 17:44:40 +0000 (10:44 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 7 Aug 2015 22:03:27 +0000 (15:03 -0700)
Some of the boards supported by this driver do not have differential analog
inputs. Only set the SDF_DIFF subdev_flag when the board supports it.

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>
drivers/staging/comedi/drivers/me4000.c