ieee802154: ca8210: use __func__ macro for debug messages

Instead of having the function name hard-coded (it might change and we
forgot to update them in the debug output) we can use __func__ instead
and also shorter the line so we do not need to break it.
Found by checkpatch.
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Acked-by: Harry Morris <h.morris@cascoda.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>

drivers/net/ieee802154/ca8210.c

@@ -924,7 +924,7 @@ static int ca8210_spi_transfer(
 	priv = spi_get_drvdata(spi);
 	reinit_completion(&priv->spi_transfer_complete);
 
-	dev_dbg(&spi->dev, "ca8210_spi_transfer called\n");
+	dev_dbg(&spi->dev, "%s called\n", __func__);
 
 	cas_ctl = kmalloc(sizeof(*cas_ctl), GFP_ATOMIC);
 	if (!cas_ctl)
@@ -1898,7 +1898,7 @@ static int ca8210_net_rx(struct ieee802154_hw *hw, u8 *command, size_t len)
 	unsigned long flags;
 	u8 status;
 
-	dev_dbg(&priv->spi->dev, "ca8210_net_rx(), CmdID = %d\n", command[0]);
+	dev_dbg(&priv->spi->dev, "%s: CmdID = %d\n", __func__, command[0]);
 
 	if (command[0] == SPI_MCPS_DATA_INDICATION) {
 		/* Received data */
@@ -1948,7 +1948,7 @@ static int ca8210_skb_tx(
 	struct secspec secspec;
 	unsigned int mac_len;
 
-	dev_dbg(&priv->spi->dev, "ca8210_skb_tx() called\n");
+	dev_dbg(&priv->spi->dev, "%s called\n", __func__);
 
 	/* Get addressing info from skb - ieee802154 layer creates a full
 	 * packet
@@ -2051,7 +2051,7 @@ static int ca8210_xmit_async(struct ieee802154_hw *hw, struct sk_buff *skb)
 	struct ca8210_priv *priv = hw->priv;
 	int status;
 
-	dev_dbg(&priv->spi->dev, "calling ca8210_xmit_async()\n");
+	dev_dbg(&priv->spi->dev, "calling %s\n", __func__);
 
 	priv->tx_skb = skb;
 	priv->async_tx_pending = true;