[spp] [PATCH 2/5] docs: resolve broken reference link

[x-fn-spp-ml at ntt-tx.co.jp]

From: Hideyuki Yamashita <yamashita.hideyuki at ntt-tx.co.jp>

This patch resolves broken link in reference section.
This is pointed out by DPDK bugzilla.

https://bugs.dpdk.org/show_bug.cgi?id=441

Signed-off-by: Hideyuki Yamashita <yamashita.hideyuki at ntt-tx.co.jp>
Signed-off-by: Naoki Takada <ntakada14 at gmail.com>
---
 docs/guides/design/spp.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/guides/design/spp.rst b/docs/guides/design/spp.rst
index 2c3ee46..43da0d4 100644
--- a/docs/guides/design/spp.rst
+++ b/docs/guides/design/spp.rst
@@ -27,11 +27,11 @@ SPP primary process is responsible for resource management, for example,
 initializing ports, mbufs or shared memory. On the other hand,
 secondary processes of ``spp_nfv`` are working for forwarding
 `[1]
-<https://dpdksummit.com/Archive/pdf/2017USA/Implementation%20and%20Testing%20of%20Soft%20Patch%20Panel.pdf>`_.
+<https://www.dpdk.org/wp-content/uploads/sites/35/2018/06/Implementation-and-Testing-of-Soft-Patch-Panel.pdf>`_.
 
 
 Reference
 ---------
 
 * [1] `Implementation and Testing of Soft Patch Panel
-  <https://dpdksummit.com/Archive/pdf/2017USA/Implementation%20and%20Testing%20of%20Soft%20Patch%20Panel.pdf>`_
+  <https://www.dpdk.org/wp-content/uploads/sites/35/2018/06/Implementation-and-Testing-of-Soft-Patch-Panel.pdf>`_
-- 
2.25.1