dt-bindings: dma: Drop unused QCom hidma binding

The QCom hidma binding was used on a defunct QCom server platform which
mainly used ACPI. DT support in the Linux driver has been broken since
2018, so it seems this binding is unused and can be dropped.

Signed-off-by: Rob Herring (Arm) <[email protected]>
Acked-by: Konrad Dybcio <[email protected]>
Reviewed-by: Jeffrey Hugo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: robherring