drm/amdgpu: use ARRAY_SIZE() to add amdgpu debugfs files

to easily add new debugfs file w/o changing the hardcoded list count.

Signed-off-by: Xiaojie Yuan <[e-mail]>
Reviewed-by: Hawking Zhang <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 {
 #if defined(CONFIG_DEBUG_FS)
 	if (amdgpu_sriov_vf(adev))
-		return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_fence_list_sriov, 1);
-	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_fence_list, 2);
+		return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_fence_list_sriov,
+						ARRAY_SIZE(amdgpu_debugfs_fence_list_sriov));
+	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_fence_list,
+					ARRAY_SIZE(amdgpu_debugfs_fence_list));
 #else
 	return 0;
 #endif

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

···
 int amdgpu_debugfs_gem_init(struct amdgpu_device *adev)
 {
 #if defined(CONFIG_DEBUG_FS)
-	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_gem_list, 1);
+	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_gem_list,
+					ARRAY_SIZE(amdgpu_debugfs_gem_list));
 #endif
 	return 0;
 }

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

···
 int amdgpu_debugfs_sa_init(struct amdgpu_device *adev)
 {
 #if defined(CONFIG_DEBUG_FS)
-	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1);
+	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list,
+					ARRAY_SIZE(amdgpu_debugfs_sa_list));
 #else
 	return 0;
 #endif