Make internal functions static in kernel modules

Internal functions in some of the kernel modules were not marked as
static and have now been fixed.

Change-Id: Ibec000e4370f2438e7190a9178e05513fcccda26
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
diff --git a/remoteproc/corstone1000_es_reset.c b/remoteproc/corstone1000_es_reset.c
index e62ebdb..bda57fe 100644
--- a/remoteproc/corstone1000_es_reset.c
+++ b/remoteproc/corstone1000_es_reset.c
@@ -1,5 +1,6 @@
 /*
- * Copyright (c) 2022 Arm Limited. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
+ * SPDX-License-Identifier: GPL-2.0-only
  *
  * This program is free software and is provided to you under the terms of the
  * GNU General Public License version 2 as published by the Free Software
@@ -14,8 +15,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, you can access it online at
  * http://www.gnu.org/licenses/gpl-2.0.html.
- *
- * SPDX-License-Identifier: GPL-2.0-only
  */
 
 #include <linux/io.h>
@@ -43,8 +42,8 @@
 	void __iomem                *status;
 };
 
-int cs1k_es_assert(struct reset_controller_dev *rcdev,
-		   unsigned long id)
+static int cs1k_es_assert(struct reset_controller_dev *rcdev,
+			  unsigned long id)
 {
 	u32 status;
 	struct cs1k_es_reset_data *reset =
@@ -64,8 +63,8 @@
 	return status == EXTSYS_STATUS_RST_REQ_COMPLETED ? 0 : 1;
 }
 
-int cs1k_es_deassert(struct reset_controller_dev *rcdev,
-		     unsigned long id)
+static int cs1k_es_deassert(struct reset_controller_dev *rcdev,
+			    unsigned long id)
 {
 	u32 status;
 	struct cs1k_es_reset_data *reset =