staging: rtl8192u: Clean up comparison to NULL

Checkpatch recommended changes.
Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c

@@ -67,7 +67,7 @@ static void *ieee80211_ccmp_init(int key_idx)
 	struct ieee80211_ccmp_data *priv;
 
 	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
-	if (priv == NULL)
+	if (!priv)
 		goto fail;
 	priv->key_idx = key_idx;