drm/amdkfd: fix ttm size refactor fallout

I guess Christian didn't compile test amdkfd.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Fixes: e11bfb99 ("drm/ttm: cleanup BO size handling v3")
Cc: Christian König <christian.koenig@amd.com>
Cc: Huang Rui <ray.huang@amd.com> (v1)
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201214191725.3899147-1-daniel.vetter@ffwll.ch

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

@@ -453,7 +453,7 @@ static int add_bo_to_vm(struct amdgpu_device *adev, struct kgd_mem *mem,
 	struct amdgpu_bo *bo = mem->bo;
 	uint64_t va = mem->va;
 	struct list_head *list_bo_va = &mem->bo_va_list;
-	unsigned long bo_size = bo->tbo.mem.size;
+	unsigned long bo_size = bo->tbo.base.size;
 
 	if (!va) {
 		pr_err("Invalid VA when adding BO to VM\n");
@@ -1281,7 +1281,7 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
 		struct kgd_dev *kgd, struct kgd_mem *mem, uint64_t *size)
 {
 	struct amdkfd_process_info *process_info = mem->process_info;
-	unsigned long bo_size = mem->bo->tbo.mem.size;
+	unsigned long bo_size = mem->bo->tbo.base.size;
 	struct kfd_bo_va_list *entry, *tmp;
 	struct bo_vm_reservation_context ctx;
 	struct ttm_validate_buffer *bo_list_entry;
@@ -1402,7 +1402,7 @@ int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
 	mutex_lock(&mem->lock);
 
 	domain = mem->domain;
-	bo_size = bo->tbo.mem.size;
+	bo_size = bo->tbo.base.size;
 
 	pr_debug("Map VA 0x%llx - 0x%llx to vm %p domain %s\n",
 			mem->va,
@@ -1506,7 +1506,7 @@ int amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
 	struct amdgpu_device *adev = get_amdgpu_device(kgd);
 	struct amdkfd_process_info *process_info =
 		((struct amdgpu_vm *)vm)->process_info;
-	unsigned long bo_size = mem->bo->tbo.mem.size;
+	unsigned long bo_size = mem->bo->tbo.base.size;
 	struct kfd_bo_va_list *entry;
 	struct bo_vm_reservation_context ctx;
 	int ret;