ixgbevf: Enable jumbo frame support for X540 VF

The X540 controller allows jumbo frame setup on a per VF basis.  Enable
use of jumbo frames when the VF device belongs to the X540 controller.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbevf/defines.h b/drivers/net/ixgbevf/defines.h
index de643eb..78abb6f 100644
--- a/drivers/net/ixgbevf/defines.h
+++ b/drivers/net/ixgbevf/defines.h
@@ -65,6 +65,8 @@
 #define IXGBE_RXCTRL_DMBYPS     0x00000002  /* Descriptor Monitor Bypass */
 #define IXGBE_RXDCTL_ENABLE     0x02000000  /* Enable specific Rx Queue */
 #define IXGBE_RXDCTL_VME        0x40000000  /* VLAN mode enable */
+#define IXGBE_RXDCTL_RLPMLMASK  0x00003FFF  /* Only supported on the X540 */
+#define IXGBE_RXDCTL_RLPML_EN   0x00008000
 
 /* DCA Control */
 #define IXGBE_DCA_TXCTRL_TX_WB_RO_EN (1 << 11) /* Tx Desc writeback RO bit */