drm/i915/guc: skip scrub_ctbs selftest if reset is disabled

The test needs GT reset to trigger the scrubbing logic, so we can only
run it when reset is enabled.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <john.c.harrison@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708224158.929327-1-daniele.ceraolospurio@intel.com

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

@@ -54,6 +54,9 @@ static int intel_guc_scrub_ctbs(void *arg)
 	struct intel_engine_cs *engine;
 	struct intel_context *ce;
 
+	if (!intel_has_gpu_reset(gt))
+		return 0;
+
 	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
 	engine = intel_selftest_find_any_engine(gt);