ixgbe: Lock RSS seed, move rx_buf_len to the rx_ring

This locks the seed down so loading/unloading the driver will present
predictable hashing from RSS.  Also move the rx_buf_len out of the adapter
struct, and into the Rx ring struct.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 496a91a..628f60c 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -166,6 +166,7 @@
 
 	char name[IFNAMSIZ + 5];
 	u16 work_limit;                /* max work per interrupt */
+	u16 rx_buf_len;
 };
 
 #define RING_F_VMDQ 1
@@ -228,7 +229,6 @@
 	struct timer_list watchdog_timer;
 	struct vlan_group *vlgrp;
 	u16 bd_number;
-	u16 rx_buf_len;
 	struct work_struct reset_task;
 	struct ixgbe_q_vector q_vector[MAX_MSIX_Q_VECTORS];
 	char name[MAX_MSIX_COUNT][IFNAMSIZ + 5];