arm64: dts: ti: k3-j721s2-main: Add the main domain watchdog instances

commit 5ae0c184893ef073313d682d8d4a2e9086c75da1 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git

commit eb4c9909

 upstream

There are totally 9 instances of watchdog module. One each for the
2 A72 cores, one each for the 2 C7x cores, 1 for the GPU, 1 each
for the 4 R5F cores in the main domain. Keeping only the A72 instances
enabled and reserving the rest by default as they will be used by
their respective firmware.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Link: https://lore.kernel.org/r/20231008044657.25788-7-j-keerthy@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>