drivers: staging : wlan-ng : collect return status without variable

As caller rdev_set_default_key  not particular about -EFAULT.
We can preserve the return value of prism2_domibset_uint32.
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
----
Changes in v2:
  - remove  masking of original return value with EFAULT
Changes in v3:
  - merge patch v1 and v2 sothat it can be applied on linux-next
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/cfg80211.c

@@ -231,17 +231,9 @@ static int prism2_set_default_key(struct wiphy *wiphy, struct net_device *dev,
 {
 	struct wlandevice *wlandev = dev->ml_priv;
 
-	int err = 0;
-	int result = 0;
-
-	result = prism2_domibset_uint32(wlandev,
+	return  prism2_domibset_uint32(wlandev,
 				       DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID,
 				       key_index);
-
-	if (result)
-		err = -EFAULT;
-
-	return err;
 }
 
 static int prism2_get_station(struct wiphy *wiphy, struct net_device *dev,