net: tsec: Make redundant_init() static

redundant_init() is only called in the tsec driver. Make it static.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>

drivers/net/tsec.c

@@ -443,7 +443,7 @@ static void tsec_halt(struct udevice *dev)
  * of the eTSEC port initialization sequence,
  * the eTSEC Rx logic may not be properly initialized.
  */
-void redundant_init(struct tsec_private *priv)
+static void redundant_init(struct tsec_private *priv)
 {
 	struct tsec __iomem *regs = priv->regs;
 	uint t, count = 0;