gpu: nvgpu: add support for gsp stress test

Add debugfs entries to support GSP stress test and other
functionalities to enable the test.

JIRA CORERM-3382

Change-Id: Iab20fcfe78807e76e91c64716502a2f036ed4d18
Signed-off-by: ajeshkv <akv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2589390
Reviewed-by: Amit Pabalkar <apabalkar@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/os/linux/debug_gsp.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * GSP Debug
+ *
+ * Copyright (c) 2021, NVIDIA Corporation.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __NVGPU_DEBUG_GSP_H__
+#define __NVGPU_DEBUG_GSP_H__
+
+struct gk20a;
+
+void nvgpu_gsp_debugfs_fini(struct gk20a *g);
+int nvgpu_gsp_debugfs_init(struct gk20a *g);
+
+#endif /* __NVGPU_DEBUG_GSP_H__ */