Input: imagis - clarify the usage of protocol_b

Input: imagis - clarify the usage of protocol_b

protocol_b is a property, which tells Imagis panel to use a different
format for coordinates.

IST30XXC series is known for using protocol B, while the other series
aren't. Note this could be confusing, unlike the model name implies.

Adjust the usage of protocol_b to avoid confusion.

Signed-off-by: Raymond Hackley <raymondhackley@protonmail.com>
Link: https://lore.kernel.org/r/20240613025631.5425-2-raymondhackley@protonmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>