ieee802154: cc2520: Fix error return code in cc2520_hw_init()

In cc2520_hw_init(), if oscillator start failed, the error code
should be returned.

Fixes: 0da6bc8c ("ieee802154: cc2520: adds driver for TI CC2520 radio")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Link: https://lore.kernel.org/r/20221120075046.2213633-1-william.xuanziyang@huawei.comSigned-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

drivers/net/ieee802154/cc2520.c

@@ -970,7 +970,7 @@ static int cc2520_hw_init(struct cc2520_private *priv)
 
 		if (timeout-- <= 0) {
 			dev_err(&priv->spi->dev, "oscillator start failed!\n");
-			return ret;
+			return -ETIMEDOUT;
 		}
 		udelay(1);
 	} while (!(status & CC2520_STATUS_XOSC32M_STABLE));