drm/i915/guc: Change GEM_WARN_ON to guc_err to prevent taints in CI

This warning was supposed to catch a harmless issue, but changing to
guc_error should prevent kernel taints in CI runs.
Signed-off-by: Jesus Narvaez <jesus.narvaez@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240808204943.911727-1-jesus.narvaez@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

@@ -2014,11 +2014,12 @@ void intel_guc_submission_reset_finish(struct intel_guc *guc)
 
 	/*
 	 * Technically possible for either of these values to be non-zero here,
-	 * but very unlikely + harmless. Regardless let's add a warn so we can
+	 * but very unlikely + harmless. Regardless let's add an error so we can
 	 * see in CI if this happens frequently / a precursor to taking down the
 	 * machine.
 	 */
-	GEM_WARN_ON(atomic_read(&guc->outstanding_submission_g2h));
+	if (atomic_read(&guc->outstanding_submission_g2h))
+		guc_err(guc, "Unexpected outstanding GuC to Host in reset finish\n");
 	atomic_set(&guc->outstanding_submission_g2h, 0);
 
 	intel_guc_global_policies_update(guc);