[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/mcast.c b/net/ipv6/mcast.c
index cc3e9f5..0e03eab 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2373,7 +2373,7 @@
 	struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
 
 	seq_printf(seq,
-		   "%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n", 
+		   "%-4d %-15s " NIP6_FMT " %5d %08X %ld\n", 
 		   state->dev->ifindex, state->dev->name,
 		   NIP6(im->mca_addr),
 		   im->mca_users, im->mca_flags,
@@ -2542,15 +2542,12 @@
 	if (v == SEQ_START_TOKEN) {
 		seq_printf(seq, 
 			   "%3s %6s "
-			   "%32s %32s %6s %6s\n", "Idx",
+			   "%39s %39s %6s %6s\n", "Idx",
 			   "Device", "Multicast Address",
 			   "Source Address", "INC", "EXC");
 	} else {
 		seq_printf(seq,
-			   "%3d %6.6s "
-			   "%04x%04x%04x%04x%04x%04x%04x%04x "
-			   "%04x%04x%04x%04x%04x%04x%04x%04x "
-			   "%6lu %6lu\n",
+			   "%3d %6.6s " NIP6_FMT " " NIP6_FMT " %6lu %6lu\n",
 			   state->dev->ifindex, state->dev->name,
 			   NIP6(state->im->mca_addr),
 			   NIP6(psf->sf_addr),