arm64: dts: ti: k3-am62a-mcu: Enable MCU wakeup for R5F

commit d782fd10bd5a1d671cdc8296e50197ef7c8e1144 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



Enable MCU R5F as a wakeup source.

Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>