config: lsu rs depth to 4

Author: yizishun

config/CoreTop.json

@@ -57,7 +57,7 @@
       },
       "lsuRSParameter": {
         "name": "LSU",
-        "rsDepth": 8,
+        "rsDepth": 4,
         "fuNum": 2,
         "fuDelay": 1,
         "useWakeupSelect": true