Fix AMD-SMI test segmentation fault TestGpuMetricsRead

Issue: need to return on any failure.
The nullptr check test would segfault without-
all values in struct are not initialized.

Signed-off-by: Charis Poag <Charis.Poag@amd.com>
Change-Id: I4987fb73ba9bcb182de7a439a4286333a41bf7eb
(cherry picked from commit d74be3120e)

src/amd_smi/amd_smi.cc

@@ -1084,6 +1084,9 @@ amdsmi_status_t  amdsmi_get_gpu_metrics_info(
     amdsmi_status_t ret =
             rsmi_wrapper(rsmi_dev_gpu_metrics_info_get, processor_handle,
                     reinterpret_cast<rsmi_gpu_metrics_t*>(pgpu_metrics));
+    if (ret != AMDSMI_STATUS_SUCCESS) {
+        return ret;
+    }
     // WARNING: TEMPORARY - awaiting 1.5 update from amdgpu driver/firmware
     // intended to be removed later
     // START: REMOVE WHATS BELOW ME