watchdog: mpc8xxx_wdt: MPC8xx is HW enabled

MPC8xx watchdog is enabled at startup by HW.
If the bootloader disables it, it cannot be reenabled.
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/mpc8xxx_wdt.c

@@ -237,6 +237,7 @@ static const struct of_device_id mpc8xxx_wdt_match[] = {
 		.compatible = "fsl,mpc823-wdt",
 		.data = &(struct mpc8xxx_wdt_type) {
 			.prescaler = 0x800,
+			.hw_enabled = true,
 		},
 	},
 	{},