test: l2fwd_perf: add simpler l2 forwarding tester

`odp_l2fwd_perf` is a tester for benchmarking L2 throughput of a set of
interfaces. Tester provides a more simplified fast path handling and
configuration compared to the existing `odp_l2fwd`.

Aim is to keep the tester as simple as possible in order to provide a
stable benchmarking utility with comparable results across releases.

Signed-off-by: Tuomas Taipale <tuomas.taipale@nokia.com>
Reviewed-by: Matias Elo <matias.elo@nokia.com>

test/performance/.gitignore

@@ -16,6 +16,7 @@ odp_icache_perf
 odp_ipsec
 odp_ipsecfwd
 odp_l2fwd
+odp_l2fwd_perf
 odp_lock_perf
 odp_mem_perf
 odp_packet_gen

test/performance/Makefile.am

@@ -25,6 +25,7 @@ COMPILE_ONLY = odp_cpu_bench \
 	       odp_dma_perf \
 	       odp_ipsec \
 	       odp_l2fwd \
+	       odp_l2fwd_perf \
 	       odp_packet_gen \
 	       odp_pktio_ordered \
 	       odp_sched_latency \
@@ -79,6 +80,8 @@ odp_dmafwd_SOURCES = odp_dmafwd.c
 odp_dma_perf_SOURCES = odp_dma_perf.c
 odp_icache_perf_SOURCES = odp_icache_perf.c
 odp_ipsec_SOURCES = odp_ipsec.c
+odp_l2fwd_SOURCES = odp_l2fwd.c
+odp_l2fwd_perf_SOURCES = odp_l2fwd_perf.c
 odp_lock_perf_SOURCES = odp_lock_perf.c
 odp_mem_perf_SOURCES = odp_mem_perf.c
 odp_packet_gen_SOURCES = odp_packet_gen.c