ixgbe: add support for x540 MAC

This patch adds support for the x540 MAC which is the next MAC in the
82598/82599 line.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbe/ixgbe_mbx.c b/drivers/net/ixgbe/ixgbe_mbx.c
index aede6eb..027c628 100644
--- a/drivers/net/ixgbe/ixgbe_mbx.c
+++ b/drivers/net/ixgbe/ixgbe_mbx.c
@@ -319,8 +319,14 @@
 	u32 vflre = 0;
 	s32 ret_val = IXGBE_ERR_MBX;
 
-	if (hw->mac.type == ixgbe_mac_82599EB)
+	switch (hw->mac.type) {
+	case ixgbe_mac_82599EB:
+	case ixgbe_mac_X540:
 		vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset));
+		break;
+	default:
+		break;
+	}
 
 	if (vflre & (1 << vf_shift)) {
 		ret_val = 0;
@@ -439,19 +445,23 @@
 {
 	struct ixgbe_mbx_info *mbx = &hw->mbx;
 
-	if (hw->mac.type != ixgbe_mac_82599EB)
-		return;
+	switch (hw->mac.type) {
+	case ixgbe_mac_82599EB:
+	case ixgbe_mac_X540:
+		mbx->timeout = 0;
+		mbx->usec_delay = 0;
 
-	mbx->timeout = 0;
-	mbx->usec_delay = 0;
+		mbx->size = IXGBE_VFMAILBOX_SIZE;
 
-	mbx->size = IXGBE_VFMAILBOX_SIZE;
-
-	mbx->stats.msgs_tx = 0;
-	mbx->stats.msgs_rx = 0;
-	mbx->stats.reqs = 0;
-	mbx->stats.acks = 0;
-	mbx->stats.rsts = 0;
+		mbx->stats.msgs_tx = 0;
+		mbx->stats.msgs_rx = 0;
+		mbx->stats.reqs = 0;
+		mbx->stats.acks = 0;
+		mbx->stats.rsts = 0;
+		break;
+	default:
+		break;
+	}
 }
 
 struct ixgbe_mbx_operations mbx_ops_generic = {