Use the ARRAY_SIZE macro on array buf to determine size of the array.
Improvement suggested by coccinelle.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>