phy: Wire return value from phy_config()

Fix zynq_gem driver to handle error from phy_config correctly.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 98986bb..4b6c09f 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -879,9 +879,7 @@
 int phy_config(struct phy_device *phydev)
 {
 	/* Invoke an optional board-specific helper */
-	board_phy_config(phydev);
-
-	return 0;
+	return board_phy_config(phydev);
 }
 
 int phy_shutdown(struct phy_device *phydev)