net; ipv[46] - Remove 2 unnecessary NETDEBUG OOM messages

These messages aren't useful as there's a generic dump_stack()
on OOM.

Neaten the comment and if test above the OOM by separating the
assign in if into an allocation then if test.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ip_output.c

@@ -662,12 +662,10 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 		if (len < left)	{
 			len &= ~7;
 		}
-		/*
-		 *	Allocate buffer.
-		 */
 
-		if ((skb2 = alloc_skb(len+hlen+ll_rs, GFP_ATOMIC)) == NULL) {
-			NETDEBUG(KERN_INFO "IP: frag: no memory for new fragment!\n");
+		/* Allocate buffer */
+		skb2 = alloc_skb(len + hlen + ll_rs, GFP_ATOMIC);
+		if (!skb2) {
 			err = -ENOMEM;
 			goto fail;
 		}

net/ipv6/ip6_output.c

@@ -747,13 +747,11 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 		if (len < left)	{
 			len &= ~7;
 		}
-		/*
-		 *	Allocate buffer.
-		 */
 
-		if ((frag = alloc_skb(len + hlen + sizeof(struct frag_hdr) +
-				      hroom + troom, GFP_ATOMIC)) == NULL) {
-			NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
+		/* Allocate buffer */
+		frag = alloc_skb(len + hlen + sizeof(struct frag_hdr) +
+				 hroom + troom, GFP_ATOMIC);
+		if (!frag) {
 			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 				      IPSTATS_MIB_FRAGFAILS);
 			err = -ENOMEM;