drm/amd/powerplay: fix memory leakage when reload (v2)

add smu_free_memory when smu fini to prevent memory leakage

v2: squash in typo fix (Yintian) and warning (Harry)
Signed-off-by: Yintian Tao <yttao@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c

@@ -648,6 +648,12 @@ int smu7_init(struct pp_hwmgr *hwmgr)
 
 int smu7_smu_fini(struct pp_hwmgr *hwmgr)
 {
+	struct smu7_smumgr *smu_data = (struct smu7_smumgr *)(hwmgr->smu_backend);
+
+	smu_free_memory(hwmgr->device, (void *) smu_data->header_buffer.handle);
+	if (!cgs_is_virtualization_enabled(hwmgr->device))
+		smu_free_memory(hwmgr->device, (void *) smu_data->smu_buffer.handle);
+
 	kfree(hwmgr->smu_backend);
 	hwmgr->smu_backend = NULL;
 	cgs_rel_firmware(hwmgr->device, CGS_UCODE_ID_SMU);