arm64: dts: ti: k3-j712s2-mcu: Add the mcu domain watchdog instances

commit bd2c789430455fbc5600f715b79059fde8f86c38 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git

commit 56bc3115

 upstream

There are totally 2 instances of watchdog module in MCU domain.
These instances are coupled with the MCU domain R5F instances.
Reserving them as they are not used by A72.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Link: https://lore.kernel.org/r/20231008044657.25788-8-j-keerthy@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>