devfreq: Build governor pod scaling as OOT module

Make pod scaling governor as the OOT module.

Bug 3674466

Change-Id: Id99a72f508889d0b9c416ba908f8a2de62c594d1
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2726249
Reviewed-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
GVS: Gerrit_Virtual_Submit

drivers/Makefile

@@ -3,6 +3,7 @@
 
 LINUXINCLUDE += -I$(srctree.nvidia-oot)/include
 
+obj-m += devfreq/
 obj-m += gpu/
 obj-m += hwmon/
 obj-m += i2c/busses/

drivers/devfreq/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+
+# NOTE: Do not change or add anything in this makefile.
+# The source code and makefile rules are copied from the
+# kernel/nvidia/drivers/devfreq. This file is
+# just place-holder for empty makefile to avoid any build
+# issue when copy is not done from command line and building
+# the tree independent of source copy.

kernel-src-files-copy-list.txt

@@ -39,3 +39,7 @@ copy_dir nvgpu/drivers/gpu/nvgpu drivers/gpu/nvgpu
 copy_dir nvgpu/include include
 copy_dir nvgpu/nvsched nvsched
 copy_file nvidia/drivers/video/tegra/nvmap/include/linux/nvmap_exports.h include/linux/nvmap_exports.h
+
+# Files/directories for PODGOV
+copy_dir nvidia/drivers/devfreq drivers/devfreq
+copy_file nvidia/include/trace/events/nvhost_podgov.h include/trace/events/nvhost_podgov.h