net: ethernet: cpsw: fix build warnings for CPSW when CPTS not selected

CC      drivers/net/ethernet/ti/cpsw.o
drivers/net/ethernet/ti/cpsw.c: In function 'cpsw_ndo_ioctl':
drivers/net/ethernet/ti/cpsw.c:881:20: warning: unused variable 'priv'

The build warning is generated when CPTS is not selected in Kernel Build.
Fixing by passing the net_device pointer to cpts IOCTL instead of passing priv

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/cpsw.c

@@ -812,8 +812,9 @@ static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
 	__raw_writel(ETH_P_1588, &priv->regs->ts_ltype);
 }
 
-static int cpsw_hwtstamp_ioctl(struct cpsw_priv *priv, struct ifreq *ifr)
+static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
 {
+	struct cpsw_priv *priv = netdev_priv(dev);
 	struct cpts *cpts = &priv->cpts;
 	struct hwtstamp_config cfg;
 
@@ -878,14 +879,12 @@ static int cpsw_hwtstamp_ioctl(struct cpsw_priv *priv, struct ifreq *ifr)
 
 static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
 {
-	struct cpsw_priv *priv = netdev_priv(dev);
-
 	if (!netif_running(dev))
 		return -EINVAL;
 
 #ifdef CONFIG_TI_CPTS
 	if (cmd == SIOCSHWTSTAMP)
-		return cpsw_hwtstamp_ioctl(priv, req);
+		return cpsw_hwtstamp_ioctl(dev, req);
 #endif
 	return -ENOTSUPP;
 }