eth: dm: fec: Add gpio phy reset binding

Add the missing gpio phy reset binding to the gpio and
reset time configuration

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h
index 3b935af..fd89443 100644
--- a/drivers/net/fec_mxc.h
+++ b/drivers/net/fec_mxc.h
@@ -250,7 +250,10 @@
 	int phy_id;
 	int (*mii_postcall)(int);
 #endif
-
+#ifdef CONFIG_DM_GPIO
+	struct gpio_desc phy_reset_gpio;
+	uint32_t reset_delay;
+#endif
 #ifdef CONFIG_DM_ETH
 	u32 interface;
 #endif