The original issue is fixed some time ago, so re-enable the
test.
This reverts commit 52992b0658
("tests: skip the cpu_idle test for nsim_hs_smp")
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Evgeniy Paltsev <PaltsevEvgeniy@gmail.com>