Bluetooth: add module name for btwilink

Btwilink help did not include module name, add it.
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/bluetooth/Kconfig

@@ -241,5 +241,6 @@ config BT_WILINK
 	  core driver to communicate with the BT core of the combo chip.
 
 	  Say Y here to compile support for Texas Instrument's WiLink7 driver
-	  into the kernel or say M to compile it as module.
+	  into the kernel or say M to compile it as module (btwilink).
+
 endmenu