net: dsa: qca: ar9331: drop pointless static qualifier in ar9331_sw_mbus_init

There is no need to set variable 'mbus' static
since new value always be assigned before use it.
Signed-off-by: Mao Wenan <maowenan@huawei.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/qca/ar9331.c

@@ -266,7 +266,7 @@ static int ar9331_sw_mbus_read(struct mii_bus *mbus, int port, int regnum)
 static int ar9331_sw_mbus_init(struct ar9331_sw_priv *priv)
 {
 	struct device *dev = priv->dev;
-	static struct mii_bus *mbus;
+	struct mii_bus *mbus;
 	struct device_node *np, *mnp;
 	int ret;