watchdog: imx_sc_wdt: Fix reboot on crash

commit e56d48e9 upstream.

Currently when running the samples/watchdog/watchdog-simple.c
application and forcing a kernel crash by doing:

# ./watchdog-simple &
# echo c > /proc/sysrq-trigger

The system does not reboot as expected.

Fix it by calling imx_sc_wdt_set_timeout() to configure the i.MX8QXP
watchdog with a proper timeout.

Cc: <stable@vger.kernel.org>
Fixes: 986857ac ("watchdog: imx_sc: Add i.MX system controller watchdog support")
Reported-by: Breno Lima <breno.lima@nxp.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Breno Lima <breno.lima@nxp.com>
Link: https://lore.kernel.org/r/20200412230122.5601-1-festevam@gmail.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>