test/spinlock: remove delay for correct benchmarking
test/spinlock: remove delay for correct benchmarking

The test is to benchmark the performance of spinlock by counting the
number of spinlock acquire and release operations within the specified
time.
A typical pair of lock and unlock operations costs tens or hundreds of
nano seconds, in comparison to this, delaying 1 us outside of the locked
region is too much, compromising the goal of benchmarking the lock and
unlock performance.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Signed-off-by: Gavin Hu <207ee22c2cf71e20c5b5df8395050c07c07d8709@arm.com>
Reviewed-by: Ruifeng Wang <a548d51fbc42485a8ba807711a537e88c2b59dd2@arm.com>
Reviewed-by: Joyce Kong <c01c57df07e2f34c67ea70652554926ebc164737@arm.com>
Reviewed-by: Phil Yang <5a9b6465c065ff0e1fd5d2cb9eb2185e82f34247@arm.com>
Reviewed-by: Honnappa Nagarahalli <01ccf438b971cc1d8919c8a7f18443cae9429d8b@arm.com>
Reviewed-by: Ola Liljedahl <6d19e6e0076f8797cfccb58ffb99074265221b72@arm.com>
Acked-by: Jerin Jacob <352c4d4f9291b869992ddb67daa45ddc149fed30@marvell.com>
Acked-by: Nipun Gupta <4871fd67344c57328097f2fd932ad9a0f1f1fe74@nxp.com>
Acked-by: Konstantin Ananyev <cbd5212b59ab42a210d72992d23a3aa17cfd3eaf@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk