net: mpoa: Use kzfree rather than its implementation.

Use kzfree instead of memset() + kfree().
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/mpoa_caches.c

@@ -180,8 +180,7 @@ static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc)
 static void in_cache_put(in_cache_entry *entry)
 {
 	if (refcount_dec_and_test(&entry->use)) {
-		memset(entry, 0, sizeof(in_cache_entry));
-		kfree(entry);
+		kzfree(entry);
 	}
 }
 
@@ -416,8 +415,7 @@ static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr,
 static void eg_cache_put(eg_cache_entry *entry)
 {
 	if (refcount_dec_and_test(&entry->use)) {
-		memset(entry, 0, sizeof(eg_cache_entry));
-		kfree(entry);
+		kzfree(entry);
 	}
 }