[AUCTeX] Set automatically TeX-PDF-from-DVI variable if documentclass receives option dvipdfmx or dvipdfm

[jfbu]

Hi,

afaict in case of say \documentclass[dvipdfmx]{article}
the AUCTeX parsing does not set TeX-PDF-from-DVI variable
to "Dvipdfmx". This has to be done by user.

It would be nice to get this done automatically in case
of document class option dvipdfm or dvipdfmx.

Similarly dvips global option should trigger "Dvips"

Also options to graphicx and/or geometry package could be scanned.

Best

Jean-François