UDP counter doesn't increase

[Takashi Hibi <hibi665@xxxxxxx>]

Hi all,

UdpInDatagram in /proc/net/snmp6 doen't increase when IPv6 multicast 
UDP packets are received.
sock_queue_rcv_skb() is called directly in udpv6_mcast_deliver. I think that
udpv6_queue_rcv_skb() should be called instead of sock_queue_rcv_skb()
as IPv4.

Regards,
Takashi Hibi