arm64: dts: ti: k3-am62-wakeup: add VTM node

The am62x supports a single Voltage and Thermal Management (VTM) module
located in the wakeup domain with two associated temperature monitors
located in hot spots of the die.

Signed-off-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20230405215328.3755561-3-bb@ti.com


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>