DCE-KMD: Decouple dce-thread.h from dce.h

- dce-thread.h only used in dce-util-common.c so move it from
  dce.h to dce-util-common.c

- The dce_thread*() APIs in dce-util-common.c are unused.

- This change is required to avoid creating these unused APIs
  for other OSs like HVRTOS.

JIRA TDS-16052

Change-Id: I67e5e7201671aa6ddc07bfb4a869c825fb53e6c5
Signed-off-by: anupamg <anupamg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3172731
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Mahesh Kumar <mahkumar@nvidia.com>
Reviewed-by: Arun Swain <arswain@nvidia.com>

drivers/platform/tegra/dce/dce-util-common.c

@@ -3,6 +3,7 @@
  * SPDX-FileCopyrightText: Copyright (c) 2019-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
  */
 #include <dce.h>
+#include <dce-thread.h>
 #include <os-dce-device.h>
 #include <os-utils.h>
 #include <linux/io.h>

drivers/platform/tegra/dce/include/dce.h

@@ -13,7 +13,6 @@
 #include <os-lock.h>
 #include <os-cond.h>
 #include <dce-regs.h>
-#include <dce-thread.h>
 #include <dce-worker.h>
 #include <dce-fsm.h>
 #include <dce-pm.h>