c203482177
This performs the opposite of nand_register, allowing drivers to unregister nand devices. This is probably unnecessary for most regular drivers, but we expect sandbox drivers to get repeatedly bound/unbound, so this will help avoid dangling pointers. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>