net: mdio: xgene: remove useless xgene_mdio_status

xgene_mdio_status is declared static, and is only written once by the
driver. It appears to have been this way since the driver was first
added to the kernel tree. No other users can be found, so let's remove
it.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mdio/mdio-xgene.c

@@ -20,8 +20,6 @@
 #include <linux/prefetch.h>
 #include <net/ip.h>
 
-static bool xgene_mdio_status;
-
 u32 xgene_mdio_rd_mac(struct xgene_mdio_pdata *pdata, u32 rd_addr)
 {
 	void __iomem *addr, *rd, *cmd, *cmd_done;
@@ -421,7 +419,6 @@ static int xgene_mdio_probe(struct platform_device *pdev)
 		goto out_mdiobus;
 
 	pdata->mdio_bus = mdio_bus;
-	xgene_mdio_status = true;
 
 	return 0;