Don't use hwmon# as indicator of gpu

Previously, during the rsmi_init discovery process, the existence
of an hwmon# directory was used to distinguish between gpus nodes
and non-gpu nodes. This isn't reliable in some scenarios. Instead,
the existence of the vbios_version file is used as an
indicator that the node is indeed a gpu.

Change-Id: Icfbe5c42ed0970077b05f25c3d209308a31bec85

include/rocm_smi/rocm_smi_common.h

@@ -52,13 +52,13 @@
 
 #define CHECK_DV_IND_RANGE \
     amd::smi::RocmSMI& smi = amd::smi::RocmSMI::getInstance(); \
-    if (dv_ind >= smi.monitor_devices().size()) { \
+    if (dv_ind >= smi.devices().size()) { \
       return RSMI_STATUS_INVALID_ARGS; \
     } \
 
 #define GET_DEV_FROM_INDX  \
   CHECK_DV_IND_RANGE \
-  std::shared_ptr<amd::smi::Device> dev = smi.monitor_devices()[dv_ind]; \
+  std::shared_ptr<amd::smi::Device> dev = smi.devices()[dv_ind]; \
   assert(dev != nullptr);
 
 

include/rocm_smi/rocm_smi_main.h

@@ -76,7 +76,8 @@ class RocmSMI {
     void Cleanup(void);
 
     std::vector<std::shared_ptr<amd::smi::Device>>&
-                                  monitor_devices() {return monitor_devices_;}
+                                                  devices() {return devices_;}
+
     uint32_t DiscoverAmdgpuDevices(void);
     int DiscoverAMDPowerMonitors(bool force_update = false);
 
@@ -123,9 +124,7 @@ class RocmSMI {
     std::map<uint32_t, uint32_t> dev_ind_to_node_ind_map_;
     void AddToDeviceList(std::string dev_name);
     void GetEnvVariables(void);
-    uint32_t DiscoverAMDMonitors(void);
-
-    std::vector<std::shared_ptr<amd::smi::Device>> monitor_devices_;
+    std::shared_ptr<Monitor> FindMonitor(std::string monitor_path);
 
     RocmSMI_env_vars env_vars_;
     uint64_t init_options_;