dt-bindings: arm: arm,coresight-static-replicator: add optional clocks

As most other CoreSight devices the replicator can use either of the
optional clocks. Document those optional clocks in the schema.
Additionally document the one-off case of Zynq-7000 platforms which uses
apb_pclk and two additional debug clocks.

Fixes: 3c15fddf ("dt-bindings: arm: Convert CoreSight bindings to DT schema")
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250425-fix-nexus-4-v3-6-da4e39e86d41@oss.qualcomm.com