watchdog: cadence: Remove useless ioremap

There is no need to call ioremap. Also reg pointer is completely unused
in the driver.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

drivers/watchdog/cdns_wdt.c

@@ -25,7 +25,6 @@ struct cdns_regs {
 struct cdns_wdt_priv {
 	bool rst;
 	u32 timeout;
-	void __iomem *reg;
 	struct cdns_regs *regs;
 };
 
@@ -224,12 +223,8 @@ static int cdns_wdt_stop(struct udevice *dev)
  */
 static int cdns_wdt_probe(struct udevice *dev)
 {
-	struct cdns_wdt_priv *priv = dev_get_priv(dev);
-
 	debug("%s: Probing wdt%u\n", __func__, dev->seq);
 
-	priv->reg = ioremap((u32)priv->regs, sizeof(struct cdns_regs));
-
 	cdns_wdt_stop(dev);
 
 	return 0;