This feature is incompatble with of-platdata since it uses the
U_BOOT_DEVICE() macro. With of-platdata the only devices permitted are
those created by dtoc.
The driver is not used in SPL anyway, so exclude it from that build.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>