dt-bindings: arm: Rename Coresight filenames to match compatible

Use the compatible strings for filenames as that is the preferred naming
convention for DT bindings.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220603011933.3277315-2-robh@kernel.org


Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>