drm/i915/gt: Include the engine's fw-domains in the debug info

Add engine->fw_domain/active to the pretty printer for debug dumps and
debugfs.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200605144705.31127-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/gt/intel_engine_cs.c

@@ -1519,6 +1519,8 @@ void intel_engine_dump(struct intel_engine_cs *engine,
 		   yesno(!llist_empty(&engine->barrier_tasks)));
 	drm_printf(m, "\tLatency: %luus\n",
 		   ewma__engine_latency_read(&engine->latency));
+	drm_printf(m, "\tForcewake: %x domains, %d active\n",
+		   engine->fw_domain, atomic_read(&engine->fw_active));
 
 	rcu_read_lock();
 	rq = READ_ONCE(engine->heartbeat.systole);