drm/i915/guc: Enable GuC engine reset

Clear the 'disable resets' flag to allow GuC to reset hung contexts
(detected via pre-emption timeout).

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727002348.97202-18-matthew.brost@intel.com

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

@@ -81,8 +81,7 @@ static void guc_policies_init(struct guc_policies *policies)
 {
 	policies->dpc_promote_time = GLOBAL_POLICY_DEFAULT_DPC_PROMOTE_TIME_US;
 	policies->max_num_work_items = GLOBAL_POLICY_MAX_NUM_WI;
-	/* Disable automatic resets as not yet supported. */
-	policies->global_flags = GLOBAL_POLICY_DISABLE_ENGINE_RESET;
+	policies->global_flags = 0;
 	policies->is_valid = 1;
 }