driver core: Fix test_async_driver_probe if NUMA is disabled

driver core: Fix test_async_driver_probe if NUMA is disabled

Since commit 57ea974fb871 ("driver core: Rewrite test_async_driver_probe
to cover serialization and NUMA affinity"), running the test with NUMA
disabled results in warning messages similar to the following.

test_async_driver test_async_driver.12: NUMA node mismatch -1 != 0

If CONFIG_NUMA=n, dev_to_node(dev) returns -1, and numa_node_id()
returns 0. Both are widely used, so it appears risky to change return
values. Augment the check with IS_ENABLED(CONFIG_NUMA) instead
to fix the problem.

Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Fixes: 57ea974fb871 ("driver core: Rewrite test_async_driver_probe to cover serialization and NUMA affinity")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Link: https://lore.kernel.org/r/20191127202453.28087-1-linux@roeck-us.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>