drm/xe: Fix copyright and function naming in xe_ttm_sys_mgr

- Correct Red Hat copyright year from "2002" to "2022".
- Rename ttm_sys_mgr_fini() to xe_ttm_sys_mgr_fini() to avoid
confusion with generic TTM helpers.

No functional changes intended.

Reviewed-by: Rodrigo Vivi <[e-mail]>
Signed-off-by: Shuicheng Lin <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rodrigo Vivi <[e-mail]>

drivers/gpu/drm/xe/xe_ttm_sys_mgr.c

···
 // SPDX-License-Identifier: MIT
 /*
  * Copyright © 2021-2022 Intel Corporation
- * Copyright (C) 2021-2002 Red Hat
+ * Copyright (C) 2021-2022 Red Hat
  */
 
 #include "xe_ttm_sys_mgr.h"
···
 	.debug = xe_ttm_sys_mgr_debug
 };
 
-static void ttm_sys_mgr_fini(struct drm_device *drm, void *arg)
+static void xe_ttm_sys_mgr_fini(struct drm_device *drm, void *arg)
 {
 	struct xe_device *xe = (struct xe_device *)arg;
 	struct ttm_resource_manager *man = &xe->mem.sys_mgr;
···
 	ttm_resource_manager_init(man, &xe->ttm, gtt_size >> PAGE_SHIFT);
 	ttm_set_driver_manager(&xe->ttm, XE_PL_TT, man);
 	ttm_resource_manager_set_used(man, true);
-	return drmm_add_action_or_reset(&xe->drm, ttm_sys_mgr_fini, xe);
+	return drmm_add_action_or_reset(&xe->drm, xe_ttm_sys_mgr_fini, xe);
 }