hid: egalax: Add support for Wetab (726b)

This patch adds support for another Wetab device (726b), and grabs it
accordingly in hid-core.

[rydberg@euromail.se: rename and log message changes]
Signed-off-by: Andy Ross <andy@plausible.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

drivers/hid/hid-core.c

@@ -1302,6 +1302,7 @@ static const struct hid_device_id hid_blacklist[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },

drivers/hid/hid-egalax.c

@@ -242,6 +242,8 @@ static const struct hid_device_id egalax_devices[] = {
 			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
+			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, egalax_devices);

drivers/hid/hid-ids.h

@@ -198,6 +198,7 @@
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1	0x720c
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2	0x72a1
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3	0x480e
+#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4	0x726b
 
 #define USB_VENDOR_ID_ELECOM		0x056e
 #define USB_DEVICE_ID_ELECOM_BM084	0x0061