arm64: dts: ti: k3-am62x: Add required voltage supplies for IMX219

The device tree overlay for the IMX219 sensor requires three voltage
supplies to be defined: VANA (analog), VDIG (digital core), and VDDL
(digital I/O) [1].

Add the corresponding voltage supply definitions in the overlay so
that the same topography as dt-bindings is present in the DT overlay.

Link: https://datasheets.raspberrypi.com/camera/camera-module-2-schematics.pdf

 [1]
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>
Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>
Link: https://lore.kernel.org/r/20250502162539.322091-3-r-donadkar@ti.com


Signed-off-by: Nishanth Menon <nm@ti.com>