[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/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 8f24121..a553f39 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -225,13 +225,13 @@
 	if (sctp_debug_flag) { \
 		if (saddr->sa.sa_family == AF_INET6) { \
 			printk(KERN_DEBUG \
-			       lead "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x" trail, \
+			       lead NIP6_FMT trail, \
 			       leadparm, \
 			       NIP6(saddr->v6.sin6_addr), \
 			       otherparms); \
 		} else { \
 			printk(KERN_DEBUG \
-			       lead "%u.%u.%u.%u" trail, \
+			       lead NIPQUAD_FMT trail, \
 			       leadparm, \
 			       NIPQUAD(saddr->v4.sin_addr.s_addr), \
 			       otherparms); \