dt-bindings: arm: ti: Add binding for AM625 SiP

dt-bindings: arm: ti: Add binding for AM625 SiP

The AM6254atl SiP belongs to the K3 Multicore SoC architecture platform,
providing AM625 SoC with 512MiB of integrated DDR in the package.

For further information about the package check:
https://www.ti.com/lit/ds/symlink/am625sip.pdf

Signed-off-by: Anshul Dalal <anshuld@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20250814134531.2743874-3-anshuld@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>