tests: fix tracing.osawareness.openocd for SMP platforms

The tracing.osawareness.openocd doesn't support executing
on multicore Zephyr. However we disable multiple CPUs
usage in two different ways for this test:
 - by setting CONFIG_MP_NUM_CPUS to 1
 - by setting CONFIG_SMP to n

It's not correct for all SMP platforms to disable SMP. As
it is also excessive (we can guarantee the execution on
single core by setting CONFIG_MP_NUM_CPUS=1) let's drop
SMP disabling.

Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Evgeniy Paltsev <[email protected]>

Author: evgeniy-paltsev

samples/subsys/tracing/sample.yaml

@@ -14,7 +14,6 @@ tests:
     extra_configs:
       - CONFIG_MP_NUM_CPUS=1
       - CONFIG_DEBUG_THREAD_INFO=y
-      - CONFIG_SMP=n
     arch_exclude: posix xtensa
     platform_exclude: qemu_x86_64
   tracing.transport.uart: