Do not use the function part of the location_id

The function IDs used to be 0 on previous asics but on gfx94x and newer
asics, these bits are set. These bits are used by user applications to
uniquely identify the locations of GPU nodes. These exta bits break
hwloc and are not needed for rocrtst.

Signed-off-by: Mike Li <Tianxinmike.Li@amd.com>
Signed-off-by: David Yat Sin <David.YatSin@amd.com>
Change-Id: I1202f504645b0662d009b9c0926eebb7ddc08d73

rocrtst/suites/performance/memory_async_copy.cc

@@ -657,7 +657,10 @@ static hsa_status_t GetGPUAgents(hsa_agent_t agent, void* data) {
 
   uint8_t bus = (agent_bdf_id & (0xFF << 8)) >> 8;
   uint8_t device = (agent_bdf_id & (0x1F << 3)) >> 3;
-  uint8_t function = (agent_bdf_id & 0x07);
+
+  // The function part of the location_id hasn't been used yet
+  // and may not contain a valid function number.
+  uint8_t function = 0; //(agent_bdf_id & 0x07);
 
   if (ptr->verbosity() >  MemoryAsyncCopy::VERBOSE_STANDARD) {
     char name[64];