imx9: soc: Mask the wdog reset in src by default on i.mx9

imx9: soc: Mask the wdog reset in src by default on i.mx9

Normally, the wdog will be used for trigger external PMIC reset
through the WDOG_ANY pin. If the PMIC chip has debounce logic for
the reset signal, in some corner case the wdog can NOT trigger
external PMIC reset if the SoC has been reset internal before the
PMIC captures the WDOG_ANY pin reset, so need to keep the WDOG3-5
reset masked in the SRC to let the PMIC to do the reset safely.

Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>