drm/i915/perf: Fix kernel-doc warning

Fix kernel-doc issue from a previous commit.

Signed-off-by: Umesh Nerlige Ramappa <[email protected]>
Fixes: 2db609c ("drm/i915/perf: Replace gt->perf.lock with stream->lock for file ops")
Reviewed-by: Ashutosh Dixit <[email protected]>
Signed-off-by: Daniele Ceraolo Spurio <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: unerlige

drivers/gpu/drm/i915/i915_perf_types.h

@@ -146,8 +146,8 @@ struct i915_perf_stream {
 	 */
 	struct intel_engine_cs *engine;
 
-	/*
-	 * Lock associated with operations on stream
+	/**
+	 * @lock: Lock associated with operations on stream
 	 */
 	struct mutex lock;