dt-bindings: arm: aspeed: add ASUS X4TF board

Document the new compatibles used on ASUS X4TF.

Signed-off-by: Kelly Hung <ppighouse@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240430045853.3894633-2-Kelly_Hung@asus.com


Signed-off-by: Joel Stanley <joel@jms.id.au>