Add amdsmi_get_gpu_pm_metrics_info and amdsmi_get_gpu_reg_table_info to py-interface (v3)

v2: drop depend on libc
v3: whitespace

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Change-Id: I2eff7aa9d4f0ca8635796f82b106ac0d36176346

src/amd_smi/amd_smi.cc

@@ -1217,6 +1217,10 @@ amdsmi_status_t amdsmi_get_gpu_reg_table_info(
                     num_of_metrics);
 }
 
+void amdsmi_free_name_value_pairs(void *p) {
+    free(p);
+}
+
 amdsmi_status_t
 amdsmi_get_power_cap_info(amdsmi_processor_handle processor_handle,
                     uint32_t sensor_ind,