arm64: dts: ti: k3-am625-beagleplay: Add required voltage supplies for OV5640

arm64: dts: ti: k3-am625-beagleplay: Add required voltage supplies for OV5640

The device tree overlay for OV5640 requires following voltage
supplies:

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.

Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>
Link: https://lore.kernel.org/r/20250506045225.1246873-2-r-donadkar@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>