net: doc: Update references to skb->rxhash

In commit 61b905da33 ("net: Rename skb->rxhash to skb->hash"), skb->rxhash
was renamed to skb->hash. Update references in Documentation
accordingly.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/filter.txt

@@ -277,7 +277,7 @@ Possible BPF extensions are shown in the following table:
   mark                                  skb->mark
   queue                                 skb->queue_mapping
   hatype                                skb->dev->type
-  rxhash                                skb->rxhash
+  rxhash                                skb->hash
   cpu                                   raw_smp_processor_id()
   vlan_tci                              vlan_tx_tag_get(skb)
   vlan_pr                               vlan_tx_tag_present(skb)

Documentation/networking/packet_mmap.txt

@@ -578,7 +578,7 @@ processes. This also works in combination with mmap(2) on packet sockets.
 
 Currently implemented fanout policies are:
 
-  - PACKET_FANOUT_HASH: schedule to socket by skb's rxhash
+  - PACKET_FANOUT_HASH: schedule to socket by skb's packet hash
   - PACKET_FANOUT_LB: schedule to socket by round-robin
   - PACKET_FANOUT_CPU: schedule to socket by CPU packet arrives on
   - PACKET_FANOUT_RND: schedule to socket by random selection