drm/xe: Drop GuC submit_wq pool

Now that drm sched uses a single lockdep map for all submit_wq, drop the
GuC submit_wq pool hack.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241002131639.3425022-3-matthew.brost@intel.com


Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>