[dts] [PATCH V1] fix IndexError on FreeBSD

[xu,gang]

On FreeBSD scan ports use "pciconf -l" get interface name, 
if not restore interfaces before scan ports,
it can't get right interface,dpdk change them use nic_uio,
so dts show "IndexError: list index out of range" 

Signed-off-by: xu,gang <gangx.xu at intel.com>
---
 framework/dut.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/framework/dut.py b/framework/dut.py
index c8a3fe4..f64d4e6 100644
--- a/framework/dut.py
+++ b/framework/dut.py
@@ -187,10 +187,10 @@ class Dut(Crb):
         self.pci_devices_information()
         # make sure ipv6 enable before scan
         self.enable_tester_ipv6()
-        # scan ports before restore interface
-        self.scan_ports()
         # restore dut ports to kernel
         self.restore_interfaces()
+        # scan ports before restore interface
+        self.scan_ports()
         # rescan ports after interface up
         self.rescan_ports()
         # load port infor from config file
-- 
1.9.3