pktgen: use min() to make code cleaner

Use min() in order to make code cleaner. Issue found by coccinelle.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/pktgen.c

@@ -2778,8 +2778,7 @@ static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
 		}
 
 		i = 0;
-		frag_len = (datalen/frags) < PAGE_SIZE ?
-			   (datalen/frags) : PAGE_SIZE;
+		frag_len = min(datalen / frags, PAGE_SIZE);
 		while (datalen > 0) {
 			if (unlikely(!pkt_dev->page)) {
 				int node = numa_node_id();
@@ -2796,7 +2795,7 @@ static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
 			/*last fragment, fill rest of data*/
 			if (i == (frags - 1))
 				skb_frag_size_set(&skb_shinfo(skb)->frags[i],
-				    (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
+				    min(datalen, PAGE_SIZE));
 			else
 				skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
 			datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);