net: axienet: Unexport and remove unused mdio functions

Both axienet_mdio_{enable/disable} functions are no longer used in
xilinx_axienet_main.c due to 253761a0. And axienet_mdio_disable is
not even used in the mdio.c. So unexport and remove them.
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/xilinx/xilinx_axienet.h

@@ -611,8 +611,6 @@ static inline void axienet_dma_out_addr(struct axienet_local *lp, off_t reg,
 #endif /* CONFIG_64BIT */
 
 /* Function prototypes visible in xilinx_axienet_mdio.c for other files */
-int axienet_mdio_enable(struct axienet_local *lp);
-void axienet_mdio_disable(struct axienet_local *lp);
 int axienet_mdio_setup(struct axienet_local *lp);
 void axienet_mdio_teardown(struct axienet_local *lp);
 

drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c

@@ -153,7 +153,7 @@ static int axienet_mdio_write(struct mii_bus *bus, int phy_id, int reg,
  * Sets up the MDIO interface by initializing the MDIO clock and enabling the
  * MDIO interface in hardware.
  **/
-int axienet_mdio_enable(struct axienet_local *lp)
+static int axienet_mdio_enable(struct axienet_local *lp)
 {
 	u32 host_clock;
 
@@ -226,17 +226,6 @@ int axienet_mdio_enable(struct axienet_local *lp)
 	return axienet_mdio_wait_until_ready(lp);
 }
 
-/**
- * axienet_mdio_disable - MDIO hardware disable function
- * @lp:		Pointer to axienet local data structure.
- *
- * Disable the MDIO interface in hardware.
- **/
-void axienet_mdio_disable(struct axienet_local *lp)
-{
-	axienet_iow(lp, XAE_MDIO_MC_OFFSET, 0);
-}
-
 /**
  * axienet_mdio_setup - MDIO setup function
  * @lp:		Pointer to axienet local data structure.