cdns3: Remove unused tracepoints

cdns3: Remove unused tracepoints

Tracepoints that are defined take up around 5K each, even if they are not
used. If they are defined and not used, then they waste memory for unused
code. Soon unused tracepoints will cause warnings.

Remove the unused tracepoints of the cdns3 subsystem. They are:
cdns3_mapped_request
cdns3_map_request
cdns3_stream_transfer_split
cdns3_stream_transfer_split_next_part

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20250829015650.053498355@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>