netlink: correctly document nla_put_u64_64bit()

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netlink.h

@@ -98,7 +98,7 @@
  *   nla_put_u8(skb, type, value)	add u8 attribute to skb
  *   nla_put_u16(skb, type, value)	add u16 attribute to skb
  *   nla_put_u32(skb, type, value)	add u32 attribute to skb
- *   nla_put_u64_64bits(skb, type,
+ *   nla_put_u64_64bit(skb, type,
  *                     value, padattr)	add u64 attribute to skb
  *   nla_put_s8(skb, type, value)	add s8 attribute to skb
  *   nla_put_s16(skb, type, value)	add s16 attribute to skb