i40e/i40evf: add new device id 1588

Add new device id and support for another 20Gb device.

Change-ID: Ib1b61e5bb6201d84953f97cade39a6e3369c2cf2
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index e972b5e..dd2b620 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -437,6 +437,7 @@
 			ecmd->advertising |= ADVERTISED_100baseT_Full;
 		break;
 	case I40E_DEV_ID_20G_KR2:
+	case I40E_DEV_ID_20G_KR2_A:
 		/* backplane 20G */
 		ecmd->supported = SUPPORTED_20000baseKR2_Full;
 		ecmd->advertising = ADVERTISED_20000baseKR2_Full;