watchdog: constify watchdog_ops structures

Check for watchdog_ops structures that are only stored in the ops field of
a watchdog_device structure. This field is declared const, so watchdog_ops
structures that have this property can be declared as const also.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct watchdog_ops i@p = { ... };

@ok@
identifier r.i;
struct watchdog_device e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct watchdog_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct watchdog_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/bcm7038_wdt.c

···
 				WDIOF_MAGICCLOSE
 };
 
-static struct watchdog_ops bcm7038_wdt_ops = {
+static const struct watchdog_ops bcm7038_wdt_ops = {
 	.owner		= THIS_MODULE,
 	.start		= bcm7038_wdt_start,
 	.stop		= bcm7038_wdt_stop,

drivers/watchdog/cadence_wdt.c

···
 };
 
 /* Watchdog Core Ops */
-static struct watchdog_ops cdns_wdt_ops = {
+static const struct watchdog_ops cdns_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = cdns_wdt_start,
 	.stop = cdns_wdt_stop,

drivers/watchdog/kempld_wdt.c

···
 			WDIOF_PRETIMEOUT
 };
 
-static struct watchdog_ops kempld_wdt_ops = {
+static const struct watchdog_ops kempld_wdt_ops = {
 	.owner		= THIS_MODULE,
 	.start		= kempld_wdt_start,
 	.stop		= kempld_wdt_stop,

drivers/watchdog/rn5t618_wdt.c

···
 	.identity	= DRIVER_NAME,
 };
 
-static struct watchdog_ops rn5t618_wdt_ops = {
+static const struct watchdog_ops rn5t618_wdt_ops = {
 	.owner          = THIS_MODULE,
 	.start          = rn5t618_wdt_start,
 	.stop           = rn5t618_wdt_stop,

drivers/watchdog/softdog.c

···
 	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
 };
 
-static struct watchdog_ops softdog_ops = {
+static const struct watchdog_ops softdog_ops = {
 	.owner = THIS_MODULE,
 	.start = softdog_ping,
 	.stop = softdog_stop,

drivers/watchdog/w83627hf_wdt.c

···
 	.identity = "W83627HF Watchdog",
 };
 
-static struct watchdog_ops wdt_ops = {
+static const struct watchdog_ops wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = wdt_start,
 	.stop = wdt_stop,