idxd: Fix IDXD_FLAG_* indentation

Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Change-Id: I0352e6f617cb6ebc0322cc121365e2bb2f87ec14
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11536


Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>