XXXX Intel X540 support

*** 110,119 ****
--- 110,120 ----
                          ixgbe_ks->qbtc[i].value.ui64 +=
                              IXGBE_READ_REG(hw, IXGBE_QBTC(i));
                          break;
  
                  case ixgbe_mac_82599EB:
+                 case ixgbe_mac_X540:
                          ixgbe_ks->qbtc[i].value.ui64 +=
                              IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
                          ixgbe_ks->qbtc[i].value.ui64 +=
                              ((uint64_t)((IXGBE_READ_REG(hw,
                              IXGBE_QBTC_H(i))) & 0xF) << 32);
*** 163,172 ****
--- 164,174 ----
                  ixgbe_ks->lxonrxc.value.ui64 += IXGBE_READ_REG(hw,
                      IXGBE_LXONRXC);
                  break;
  
          case ixgbe_mac_82599EB:
+         case ixgbe_mac_X540:
                  ixgbe_ks->lxonrxc.value.ui64 += IXGBE_READ_REG(hw,
                      IXGBE_LXONRXCNT);
                  break;
  
          default:
*** 178,187 ****
--- 180,190 ----
                  ixgbe_ks->lxoffrxc.value.ui64 += IXGBE_READ_REG(hw,
                      IXGBE_LXOFFRXC);
                  break;
  
          case ixgbe_mac_82599EB:
+         case ixgbe_mac_X540:
                  ixgbe_ks->lxoffrxc.value.ui64 += IXGBE_READ_REG(hw,
                      IXGBE_LXOFFRXCNT);
                  break;
  
          default:
*** 554,563 ****
--- 557,567 ----
                                  ixgbe_ks->qbtc[i].value.ui64 +=
                                      IXGBE_READ_REG(hw, IXGBE_QBTC(i));
                                  break;
  
                          case ixgbe_mac_82599EB:
+                         case ixgbe_mac_X540:
                                  ixgbe_ks->qbtc[i].value.ui64 +=
                                      IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
                                  ixgbe_ks->qbtc[i].value.ui64 +=
                                      ((uint64_t)((IXGBE_READ_REG(hw,
                                      IXGBE_QBTC_H(i))) & 0xF) << 32);