added support for fine unipolar offset caldac, especially for pci-6042e. updated pci-6052e status to STATUS_DONE (unipolar analog output linearity calibration works correctly now).
added support for fine unipolar offset caldac, especially for pci-6042e.
updated pci-6052e status to STATUS_DONE (unipolar analog output
linearity calibration works correctly now).

Linux-Comedi/comedilib,Linux-Comedi/comedilib,Linux-Comedi/comedilib,Linux-Comedi/comedilib,olsonse/comedilib,olsonse/comedilib,Linux-Comedi/comedilib,olsonse/comedilib,olsonse/comedilib,olsonse/comedilib,olsonse/comedilib,Linux-Comedi/comedilib