net: phy: micrel: Fixed error related to uninitialized symbol ret

Initialized return variable

Fixes Old smatch warnings:
drivers/net/phy/micrel.c:1750 ksz886x_cable_test_get_status() error:
uninitialized symbol 'ret'.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/micrel.c

@@ -2088,7 +2088,8 @@ static int ksz886x_cable_test_get_status(struct phy_device *phydev,
 	const struct kszphy_type *type = phydev->drv->driver_data;
 	unsigned long pair_mask = type->pair_mask;
 	int retries = 20;
-	int pair, ret;
+	int ret = 0;
+	int pair;
 
 	*finished = false;