staging: wlan-ng: Remove unnecessary variable usage

Instead of storing the return value into a variable and then returning it, we
can club the two into a single return statement. This change was made using
the following semantic patch by Coccinelle:

@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/prism2mgmt.c

@@ -685,9 +685,7 @@ failed:
 	msg->resultcode.data = P80211ENUM_resultcode_invalid_parameters;
 
 done:
-	result = 0;
-
-	return result;
+	return 0;
 }
 
 /*----------------------------------------------------------------