arm64: dts: ti: var-som-am62p: Add support for Variscite Symphony Board

arm64: dts: ti: var-som-am62p: Add support for Variscite Symphony Board

Add device tree support for the Variscite Symphony carrier board with
the VAR-SOM-AM62P system on module.

The Symphony board includes
- uSD Card support
- USB ports and OTG
- Additional Gigabit Ethernet interface
- Uart interfaces
- OV5640 Camera support
- GPIO Expander
- CAN, I2C and general purpose interfaces

Link: https://www.variscite.it/product/single-board-computers/symphony-board/
Signed-off-by: Stefano Radaelli <stefano.radaelli21@gmail.com>
Reviewed-by: Judith Mendez <jm@ti.com>
Link: https://patch.msgid.link/20250909213749.28098-4-stefano.radaelli21@gmail.com
Signed-off-by: Nishanth Menon <nm@ti.com>