staging: ccg: Add a note about compatibility issues.

The first item on the todo list is a new user interface. Put this
information into Kconfig's help entry to people are not too confusing
once an user API changes which does not happen in kernel otherwise.

Cc: devel@driverdev.osuosl.org
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/staging/ccg/Kconfig

@@ -17,4 +17,9 @@ config USB_G_CCG
 	  Configurable Composite Gadget can be compiled "M" only
 	  or not at all.
 
+	  BIG FAT NOTE: DON'T RELY ON THIS USERINTERFACE HERE! AS PART
+	  OF THE REWORK DONE HERE WILL BE A NEW USER INTERFACE WITHOUT ANY
+	  COMPATIBILITY TO THIS SYSFS INTERFACE HERE. BE AWARE OF THIS
+	  BEFORE SELECTING THIS.
+
 endif # USB_GADGET