sfc: Move siena_nic_data::ipv6_rss_key to efx_nic::rx_hash_key

We will use this hash key for Toeplitz IPv4 hashing too.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index bdec542..28f3ff4 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -735,6 +735,7 @@
 	unsigned n_tx_channels;
 	unsigned int rx_buffer_len;
 	unsigned int rx_buffer_order;
+	u8 rx_hash_key[40];
 
 	unsigned int_error_count;
 	unsigned long int_error_expire;