ipmi/watchdog: Constify ident

ident is not modified and can be made const to allow the compiler to put
it in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Message-Id: <20211128220154.32927-1-rikard.falkeborn@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_watchdog.c

@@ -668,7 +668,7 @@ static int ipmi_heartbeat(void)
 	return rv;
 }
 
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
 	.options	= 0,	/* WDIOF_SETTIMEOUT, */
 	.firmware_version = 1,
 	.identity	= "IPMI"