net: designware: Export various functions/struct to allow subclassing

To allow other DM drivers to subclass the designware driver various
functions and structures need to be exported. Export these.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Romain Perier <romain.perier@collabora.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/designware.h b/drivers/net/designware.h
index d345c5b..087ebef 100644
--- a/drivers/net/designware.h
+++ b/drivers/net/designware.h
@@ -245,6 +245,10 @@
 };
 
 #ifdef CONFIG_DM_ETH
+int designware_eth_ofdata_to_platdata(struct udevice *dev);
+int designware_eth_probe(struct udevice *dev);
+extern const struct eth_ops designware_eth_ops;
+
 struct dw_eth_pdata {
 	struct eth_pdata eth_pdata;
 	u32 reset_delays[3];