imx8mp: add board-detection for D18/LEVY module on B79 and MV
This patch adds board-detection for D18/LEVY modules including detection of HW-revision.
Currently B79 baseboard is assumed (hard-coded) when a D18 module is detected. So far we don't have a way to tell the difference between a B79 and ModularVision baseboard. (While there exist several different HW-revisions of B79 baseboards with SW-visible differencs, there probably won't be a HW-revision detection for B79, because there doesn't seem to be a defined way of telling the different revision apart.)
Edited by Marc-Oliver Westerburg