This reverts the change from #13895 and instead resolves the issue by
increasing the scale factor limit to 1.4
There is an open question as to why some RM3100 compasses show a
different scale factor (by about 1.25 times) to other versions of the
same sensor. As we haven't resolved this properly it seems the correct
thing to do is follow the datasheet but allow for a wider range of
scale factors to cope with the variation between sensors