[SWDEV-518561] P1: Inconsistent memory partition change (#315)

Changes:
- Cleaned up drm connections before changing memory partitions

Change-Id: I08430d22536bb6094c91a06fbf2f74d9b75a4fa7

Signed-off-by: Charis Poag <Charis.Poag@amd.com>

[ROCm/amdsmi commit: 6a43b64d0c]

projects/amdsmi/src/amd_smi/amd_smi.cc

@@ -1930,6 +1930,8 @@ amdsmi_set_gpu_memory_partition(amdsmi_processor_handle processor_handle,
     } else if (it == nps_amdsmi_to_RSMI.end()) {
         return AMDSMI_STATUS_INVAL;
     }
+
+    amd::smi::AMDSmiSystem::getInstance().clean_up_drm();
     amdsmi_status_t ret = rsmi_wrapper(rsmi_dev_memory_partition_set, processor_handle, 0,
                                         rsmi_type);