staging: vt6655: Replace unused return value of vt6655_get_current_tsf

Replace unused return value with u64 to increase readability,
reduce address and dereference operators and omit pqwCurrTSF that
uses CamelCase which is not accepted by checkpatch.pl

Signed-off-by: Philipp Hortmann <[e-mail]>
Link: https://lore.kernel.org/r/62c83d7862[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/vt6655/card.c

···
 	u64 local_tsf;
 	u64 qwTSFOffset = 0;
 
-	vt6655_get_current_tsf(priv, &local_tsf);
+	local_tsf = vt6655_get_current_tsf(priv);
 
 	if (qwBSSTimestamp != local_tsf) {
 		qwTSFOffset = CARDqGetTSFOffset(byRxRate, qwBSSTimestamp,
···
 bool CARDbSetBeaconPeriod(struct vnt_private *priv,
 			  unsigned short wBeaconInterval)
 {
-	u64 qwNextTBTT = 0;
+	u64 qwNextTBTT;
 
-	vt6655_get_current_tsf(priv, &qwNextTBTT); /* Get Local TSF counter */
+	qwNextTBTT = vt6655_get_current_tsf(priv); /* Get Local TSF counter */
 
 	qwNextTBTT = CARDqGetNextTBTT(qwNextTBTT, wBeaconInterval);
 
···
  *
  * Return Value: true if success; otherwise false
  */
-bool vt6655_get_current_tsf(struct vnt_private *priv, u64 *pqwCurrTSF)
+u64 vt6655_get_current_tsf(struct vnt_private *priv)
 {
 	void __iomem *iobase = priv->port_offset;
 	unsigned short ww;
···
 			break;
 	}
 	if (ww == W_MAX_TIMEOUT)
-		return false;
+		return 0;
 	low = ioread32(iobase + MAC_REG_TSFCNTR);
 	high = ioread32(iobase + MAC_REG_TSFCNTR + 4);
-	*pqwCurrTSF = le64_to_cpu(low + ((u64)high << 32));
-
-	return true;
+	return le64_to_cpu(low + ((u64)high << 32));
 }
 
 /*
···
 			   unsigned short wBeaconInterval)
 {
 	void __iomem *iobase = priv->port_offset;
-	u64 qwNextTBTT = 0;
+	u64 qwNextTBTT;
 
-	vt6655_get_current_tsf(priv, &qwNextTBTT); /* Get Local TSF counter */
+	qwNextTBTT = vt6655_get_current_tsf(priv); /* Get Local TSF counter */
 
 	qwNextTBTT = CARDqGetNextTBTT(qwNextTBTT, wBeaconInterval);
 	/* Set NextTBTT */

drivers/staging/vt6655/card.h

···
 			   unsigned short wBeaconInterval);
 void CARDvUpdateNextTBTT(struct vnt_private *priv, u64 qwTSF,
 			 unsigned short wBeaconInterval);
-bool vt6655_get_current_tsf(struct vnt_private *priv, u64 *pqwCurrTSF);
+u64 vt6655_get_current_tsf(struct vnt_private *priv);
 u64 CARDqGetNextTBTT(u64 qwTSF, unsigned short wBeaconInterval);
 u64 CARDqGetTSFOffset(unsigned char byRxRate, u64 qwTSF1, u64 qwTSF2);
 unsigned char CARDbyGetPktType(struct vnt_private *priv);

drivers/staging/vt6655/device_main.c

···
 	struct vnt_private *priv = hw->priv;
 	u64 tsf;
 
-	vt6655_get_current_tsf(priv, &tsf);
+	tsf = vt6655_get_current_tsf(priv);
 
 	return tsf;
 }