staging: ks7010: refactor ks_wlan_set_scan_type function

This commit changes logic to handle invalid values first
and just assign valid ones afterwards.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks_wlan_net.c

@@ -1940,14 +1940,11 @@ static int ks_wlan_set_scan_type(struct net_device *dev,
 	if (priv->sleep_mode == SLP_SLEEP)
 		return -EPERM;
 	/* for SLEEP MODE */
-	if (*uwrq == ACTIVE_SCAN) {	/* 0 */
-		priv->reg.scan_type = ACTIVE_SCAN;
-	} else if (*uwrq == PASSIVE_SCAN) {	/* 1 */
-		priv->reg.scan_type = PASSIVE_SCAN;
-	} else {
+
+	if (*uwrq != ACTIVE_SCAN && *uwrq != PASSIVE_SCAN)
 		return -EINVAL;
-	}
 
+	priv->reg.scan_type = *uwrq;
 	return 0;
 }