linux-imx

watchdog: Add STM32 IWDG driver

This patch adds IWDG (Independent WatchDoG) support for STM32 platform.

Signed-off-by: Yannick FERTRE <yannick.fertre@st.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>