!497 20.03-lts-sp4 dpdk回退到 19.11版本，本次提交适配dpdk-19.11

From: @lyn1001 
Reviewed-by: @jiangheng12 
Signed-off-by: @jiangheng12

lwip.spec

@@ -4,12 +4,11 @@
 Summary: lwip is a small independent implementation of the TCP/IP protocol suite
 Name:    lwip
 Version: 2.1.3
-Release: 78
+Release: 79
 License: BSD
 URL:     http://savannah.nongnu.org/projects/lwip/
 Source0: http://download.savannah.nongnu.org/releases/lwip/%{name}-%{version}.zip
 
-BuildRequires: dpdk-devel >= 21.11-56
 
 Patch6001:  backport-tcp-fix-sequence-number-comparison.patch
 Patch6002:  backport-tcp-tighten-up-checks-for-received-SYN.patch
@@ -103,7 +102,7 @@ find %{_builddir}/%{name}-%{version} -type f -exec dos2unix -q {} \;
 %autopatch -p1
 
 %build
-#export DPDK_VERSION_1911=1
+export DPDK_VERSION_1911=1
 cd %{_builddir}/%{name}-%{version}/src
 %make_build
 
@@ -117,6 +116,9 @@ cd %{_builddir}/%{name}-%{version}/src
 %{_libdir}/liblwip.a
 
 %changelog
+* Fri Nov 3 2023 liyanan <liyanan61@h-parners.com> - 2.1.3-79
+- Adapt dpdk fallback
+
 * Sun Oct 08 2023 jiangheng <jiangheng14@huawei.com> - 2.1.3-78
 - lstack_lwip: external api start with do_lwip_ prefix