drm/xe/oa: Destroy the stream_lock mutex

The mutex allocated in xe_oa_stream_init() was never previously
destroyed. Do so now.

Fixes: e936f885 ("drm/xe/oa/uapi: Expose OA stream fd")
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240628052125.1847989-1-ashutosh.dixit@intel.com

drivers/gpu/drm/xe/xe_oa.c

@@ -824,6 +824,8 @@ static void xe_oa_stream_destroy(struct xe_oa_stream *stream)
 
 	WRITE_ONCE(u->exclusive_stream, NULL);
 
+	mutex_destroy(&stream->stream_lock);
+
 	xe_oa_disable_metric_set(stream);
 	xe_exec_queue_put(stream->k_exec_q);