tests: benchmarks/latency: limit CPU to 1 for Intel ADSP ACE4.0

Due to addition of busy threads running on other cores, and
the simulator runs in single thread bouncing through all cores,
we are wasting quite a bit of time just busy waiting. This makes
each simulator run too long for CI. So limit CPU number to 1.

Signed-off-by: Daniel Leung <[email protected]>

Author: dcpleung

tests/benchmarks/latency_measure/boards/intel_adsp_ace40_nvl_sim.conf

@@ -0,0 +1,6 @@
+# Due to addition of busy threads running on other cores,
+# and the simulator runs in single thread bouncing through
+# all cores, we are wasting quite a bit of time just busy
+# waiting. This makes each simulator run too long for CI.
+# So limit CPU number to 1.
+CONFIG_MP_MAX_NUM_CPUS=1