staging: comedi: adl_pci9111: cleanup ai read in pci9111_ai_insn_read()
The shift, maxdata, and invert values, used to handle the 12-/16-bit analog input differences, can be calculated based on the subdevice maxdata value. 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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