at86rf230: move RX_SAFE_MODE setting to hw_init

There is no need to set this bit in start callback which could be
called more than once.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ieee802154/at86rf230.c

@@ -1010,13 +1010,8 @@ at86rf230_state(struct ieee802154_dev *dev, int state)
 static int
 at86rf230_start(struct ieee802154_dev *dev)
 {
-	struct at86rf230_local *lp = dev->priv;
 	u8 rc;
 
-	rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
-	if (rc)
-		return rc;
-
 	rc = at86rf230_state(dev, STATE_TX_ON);
 	if (rc)
 		return rc;
@@ -1300,6 +1295,10 @@ static int at86rf230_hw_init(struct at86rf230_local *lp)
 	if (rc)
 		return rc;
 
+	rc = at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1);
+	if (rc)
+		return rc;
+
 	rc = at86rf230_write_subreg(lp, SR_IRQ_MASK, IRQ_TRX_END);
 	if (rc)
 		return rc;