HID: force feedback driver for GreenAsia 0x12 PID

I have implemented Force Feedback driver for another "GreeAsia" based device
(0e8f:0012 "GreenAsia Inc. USB Joystick"). The functionality was tested with
MANTA Warior MM816 and SpeedLink Strike2 SL-6635 and fftest software -
everything seems to work right.

Signed-off-by: Lukasz Lubojanski <lukasz@lubojanski.info>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 1033129..81dd9b8 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -237,6 +237,15 @@
 	---help---
 	Support for Sunplus wireless desktop.
 
+config GREENASIA_FF
+	tristate "GreenAsia (Product ID 0x12) force feedback support"
+	depends on USB_HID
+	select INPUT_FF_MEMLESS
+	---help---
+	Say Y here if you have a GreenAsia (Product ID 0x12) based game controller
+	(like MANTA Warior MM816 and SpeedLink Strike2 SL-6635) or adapter
+	and want to enable force feedback support for it.
+
 config THRUSTMASTER_FF
 	tristate "ThrustMaster devices support"
 	depends on USB_HID