driver: ldpaa: Add api to return linked PHY ID of DPMAC

DPMAC represents physical line on the board. This physical
line eventually asscociate with on-board PHY.

So Add an api to return linked PHY ID of DPMAC object.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/fsl-mc/ldpaa_wriop.h b/include/fsl-mc/ldpaa_wriop.h
index ca8e440..6dc159d 100644
--- a/include/fsl-mc/ldpaa_wriop.h
+++ b/include/fsl-mc/ldpaa_wriop.h
@@ -40,8 +40,8 @@
 struct wriop_dpmac_info {
 	u8 enabled;
 	u8 id;
-	u8 phy_addr;
 	u8 board_mux;
+	int phy_addr;
 	void *phy_regs;
 	phy_interface_t enet_if;
 	struct phy_device *phydev;
@@ -56,6 +56,7 @@
 void wriop_init_dpmac(int, int, int);
 void wriop_disable_dpmac(int);
 void wriop_enable_dpmac(int);
+u8 wriop_is_enabled_dpmac(int dpmac_id);
 void wriop_set_mdio(int, struct mii_dev *);
 struct mii_dev *wriop_get_mdio(int);
 void wriop_set_phy_address(int, int);