HID: wacom: peport In Range event according to the spec

Some Cintiq and Intuos tablets report In Range event. This event is sent before
valid data is reported when tool enters proximity; or before out of proximity
event is reported when tool exits.

While entering proximity, In Range means a pen is detected. This information
can be used for palm/touch rejection on both pen and touch enabled devices.
While exiting, it means the tool has reached its maximum detectable distance.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
index 7afd929..72e78cc 100644
--- a/drivers/hid/wacom_wac.h
+++ b/drivers/hid/wacom_wac.h
@@ -189,6 +189,7 @@
 	int tool[2];
 	int id[2];
 	__u32 serial[2];
+	bool reporting_data;
 	struct wacom_features features;
 	struct wacom_shared *shared;
 	struct input_dev *input;