HID: topre: Add support for 87 keys Realforce R2

The tenkeyless version of the Realforce R2 has the same issue of the
full size one, the report fixup is needed to make n-key rollover
work instead of 6 key rollover
Signed-off-by: Alessandro Manca <crizan.git@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/Kconfig

@@ -1122,7 +1122,7 @@ config HID_TOPRE
 	tristate "Topre REALFORCE keyboards"
 	depends on HID
 	help
-	  Say Y for N-key rollover support on Topre REALFORCE R2 108 key keyboards.
+	  Say Y for N-key rollover support on Topre REALFORCE R2 108/87 key keyboards.
 
 config HID_THINGM
 	tristate "ThingM blink(1) USB RGB LED"

drivers/hid/hid-ids.h

@@ -1252,6 +1252,7 @@
 
 #define USB_VENDOR_ID_TOPRE			0x0853
 #define USB_DEVICE_ID_TOPRE_REALFORCE_R2_108			0x0148
+#define USB_DEVICE_ID_TOPRE_REALFORCE_R2_87			0x0146
 
 #define USB_VENDOR_ID_TOPSEED		0x0766
 #define USB_DEVICE_ID_TOPSEED_CYBERLINK	0x0204

drivers/hid/hid-topre.c

@@ -36,6 +36,8 @@ static __u8 *topre_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 static const struct hid_device_id topre_id_table[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TOPRE,
 			 USB_DEVICE_ID_TOPRE_REALFORCE_R2_108) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_TOPRE,
+			 USB_DEVICE_ID_TOPRE_REALFORCE_R2_87) },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, topre_id_table);