Input: wacom - add support for new LCD tablets

This adds support for the foolowing Wacom devices:

 - 0x9F - a single touch only LCD tablet;
 - 0xE2 - a two finger touch only LCD tablet;
 - 0xE3 -  a two finger touch, penabled LCD tablet.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h
index 1bfe9a3..39c2516 100644
--- a/drivers/input/tablet/wacom_wac.h
+++ b/drivers/input/tablet/wacom_wac.h
@@ -19,7 +19,9 @@
 #define WACOM_PKGLEN_INTUOS 	10
 #define WACOM_PKGLEN_PENABLED	 8
 #define WACOM_PKGLEN_TPC1FG	 5
+#define WACOM_PKGLEN_TPC2FG 	14
 
+/* device IDs */
 #define STYLUS_DEVICE_ID	0x02
 #define TOUCH_DEVICE_ID		0x03
 #define CURSOR_DEVICE_ID	0x06
@@ -43,6 +45,7 @@
 	WACOM_BEE,
 	WACOM_MO,
 	TABLETPC,
+	TABLETPC2FG,
 	MAX_TYPE
 };
 
@@ -54,8 +57,11 @@
 	int pressure_max;
 	int distance_max;
 	int type;
-	int touch_x_max;
-	int touch_y_max;
+	int device_type;
+	int x_phy;
+	int y_phy;
+	unsigned char unit;
+	unsigned char unitExpo;
 };
 
 struct wacom_wac {