[WATCHDOG] constify function pointer tables

"static struct file_operations" should be
"static const struct file_operations".

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/ar7_wdt.c

@@ -279,7 +279,7 @@ static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
 	}
 }
 
-static struct file_operations ar7_wdt_fops = {
+static const struct file_operations ar7_wdt_fops = {
 	.owner		= THIS_MODULE,
 	.write		= ar7_wdt_write,
 	.ioctl		= ar7_wdt_ioctl,

drivers/watchdog/bfin_wdt.c

@@ -390,7 +390,7 @@ static struct platform_driver bfin_wdt_driver = {
 	.resume    = bfin_wdt_resume,
 };
 
-static struct file_operations bfin_wdt_fops = {
+static const struct file_operations bfin_wdt_fops = {
 	.owner    = THIS_MODULE,
 	.llseek   = no_llseek,
 	.write    = bfin_wdt_write,

drivers/watchdog/it8712f_wdt.c

@@ -296,7 +296,7 @@ it8712f_wdt_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static struct file_operations it8712f_wdt_fops = {
+static const struct file_operations it8712f_wdt_fops = {
 	.owner = THIS_MODULE,
 	.llseek = no_llseek,
 	.write = it8712f_wdt_write,

drivers/watchdog/mpc5200_wdt.c

@@ -158,7 +158,7 @@ static int mpc5200_wdt_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static struct file_operations mpc5200_wdt_fops = {
+static const struct file_operations mpc5200_wdt_fops = {
 	.owner	= THIS_MODULE,
 	.write	= mpc5200_wdt_write,
 	.ioctl	= mpc5200_wdt_ioctl,

drivers/watchdog/mtx-1_wdt.c

@@ -180,7 +180,7 @@ static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count,
 	return count;
 }
 
-static struct file_operations mtx1_wdt_fops = {
+static const struct file_operations mtx1_wdt_fops = {
 	.owner 		= THIS_MODULE,
 	.llseek		= no_llseek,
 	.ioctl		= mtx1_wdt_ioctl,