This series adds supports for Imagis IST3038 and IST30XXB IC, which are
variants of Imagis IST3038 IC. They have a different register map
(labeled protocol b), but otherwise it seems to be the same IC.
It is also possible to support various other Imagis ICs using
protocol b, such as (but not limited to) IST3044B, IST3026, IST3032,
IST3026B, IST3032B. However, most of them (all except IST3044B)
use a different coordinate format, so extra effort would be needed
to support those.
Tested on Samsung Galaxy Core Prime and Grand Max.