HID: Add support for chicony multitouch screens.

Adds a hid quirk for the chicony multitouch screen found in the Acer
Aspire 1820pt notebook.
Signed-off-by: NDavid Gow <david@ingeniumdigital.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/hid-ids.h

@@ -149,6 +149,7 @@
 
 #define USB_VENDOR_ID_CHICONY		0x04f2
 #define USB_DEVICE_ID_CHICONY_TACTICAL_PAD	0x0418
+#define USB_DEVICE_ID_CHICONY_MULTI_TOUCH	0xb19d
 
 #define USB_VENDOR_ID_CIDC		0x1677
 

drivers/hid/usbhid/hid-quirks.c

@@ -77,6 +77,8 @@ static const struct hid_blacklist {
 
 	{ USB_VENDOR_ID_PI_ENGINEERING, USB_DEVICE_ID_PI_ENGINEERING_VEC_USB_FOOTPEDAL, HID_QUIRK_HIDINPUT_FORCE },
 
+	{ USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH, HID_QUIRK_MULTI_INPUT },
+
 	{ 0, 0 }
 };