arm64: dts: ti: k3-am62x: Add required voltage supplies for OV5640

arm64: dts: ti: k3-am62x: Add required voltage supplies for OV5640

The device tree overlay for OV5640 requires following voltage
supplies as mentioned in the table 8-3 of the data-sheet [1].

AVDD-supply: Analog voltage supply, 2.8 volts
DOVDD-supply: Digital I/O voltage supply, 1.8 volts
DVDD-supply: Digital core voltage supply, 1.5 volts

Add them in the overlay.

Link: https://cdn.sparkfun.com/datasheets/Sensors/LightImaging/OV5640_datasheet.pdf
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>
Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>
Link: https://lore.kernel.org/r/20250502162539.322091-4-r-donadkar@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>