[NET]: Use NIP6_FMT in kernel.h

There are errors and inconsistency in the display of NIP6 strings.
	ie: net/ipv6/ip6_flowlabel.c

There are errors and inconsistency in the display of NIPQUAD strings too.
	ie: net/netfilter/nf_conntrack_ftp.c

This patch:
	adds NIP6_FMT to kernel.h
	changes all code to use NIP6_FMT
	fixes net/ipv6/ip6_flowlabel.c
	adds NIPQUAD_FMT to kernel.h
	fixes net/netfilter/nf_conntrack_ftp.c
	changes a few uses of "%u.%u.%u.%u" to NIPQUAD_FMT for symmetry to NIP6_FMT

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 964ad9d..4183c8d 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -629,9 +629,7 @@
 {
 	while(fl) {
 		seq_printf(seq,
-			   "%05X %-1d %-6d %-6d %-6ld %-8ld "
-			   "%02x%02x%02x%02x%02x%02x%02x%02x "
-			   "%-4d\n",
+			   "%05X %-1d %-6d %-6d %-6ld %-8ld " NIP6_FMT " %-4d\n",
 			   (unsigned)ntohl(fl->label),
 			   fl->share,
 			   (unsigned)fl->owner,
@@ -647,8 +645,8 @@
 static int ip6fl_seq_show(struct seq_file *seq, void *v)
 {
 	if (v == SEQ_START_TOKEN)
-		seq_puts(seq, "Label S Owner  Users  Linger Expires  "
-			      "Dst                              Opt\n");
+		seq_printf(seq, "%-5s %-1s %-6s %-6s %-6s %-8s %-39s %s\n",
+			   "Label", "S", "Owner", "Users", "Linger", "Expires", "Dst", "Opt");
 	else
 		ip6fl_fl_seq_show(seq, v);
 	return 0;