[UDP]: Restore missing inDatagrams increments

The previous move of the the UDP inDatagrams counter caused the
counting of encapsulated packets, SUNRPC data (as opposed to call)
packets and RXRPC packets to go missing.

This patch restores all of these.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 87bccec..36bdcd2 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -34,6 +34,7 @@
 #include <linux/ipv6.h>
 #include <linux/icmpv6.h>
 #include <linux/init.h>
+#include <linux/module.h>
 #include <linux/skbuff.h>
 #include <asm/uaccess.h>
 
@@ -51,6 +52,7 @@
 #include "udp_impl.h"
 
 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
+EXPORT_SYMBOL(udp_stats_in6);
 
 static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
 {