[IPV6]: Preserve procfs IPV6 address output format

Procfs always output IPV6 addresses without the colon
characters, and we cannot change that.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 323924e..a536332 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -228,6 +228,7 @@
 	ntohs((addr).s6_addr16[6]), \
 	ntohs((addr).s6_addr16[7])
 #define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
+#define NIP6_SEQFMT "%04x%04x%04x%04x%04x%04x%04x%04x"
 
 #if defined(__LITTLE_ENDIAN)
 #define HIPQUAD(addr) \