change low trip 16000, min_threads low trip 32

   OMPX_LowTripCount("LIBOMPTARGET_AMDGPU_LOW_TRIPCOUNT", 16000),
   OMPX_SmallBlockSize("LIBOMPTARGET_MIN_THREADS_FOR_LOW_TRIP_COUNT", 32),

Change-Id: I19b8b10e219c91015079aeee6080d487acf3c694

Author: ronlieb

offload/plugins-nextgen/amdgpu/src/rtl.cpp

@@ -2760,8 +2760,8 @@ struct AMDGPUDeviceTy : public GenericDeviceTy, AMDGenericDeviceTy {
             "LIBOMPTARGET_AMDGPU_BIG_JUMP_LOOP_TEAMS_PER_CU", 0),
         OMPX_BigJumpLoopMaxTotalTeams(
             "LIBOMPTARGET_AMDGPU_BIG_JUMP_LOOP_MAX_TOTAL_TEAMS", 1024 * 1024),
-        OMPX_LowTripCount("LIBOMPTARGET_AMDGPU_LOW_TRIPCOUNT", 2000),
-        OMPX_SmallBlockSize("LIBOMPTARGET_MIN_THREADS_FOR_LOW_TRIP_COUNT", 8),
+        OMPX_LowTripCount("LIBOMPTARGET_AMDGPU_LOW_TRIPCOUNT", 16000),
+        OMPX_SmallBlockSize("LIBOMPTARGET_MIN_THREADS_FOR_LOW_TRIP_COUNT", 32),
         OMPX_NumBlocksForLowTripcount("LIBOMPTARGET_BLOCKS_FOR_LOW_TRIP_COUNT",
                                       0),
         OMPX_WavesPerCUForLowTripcount(