UPSTREAM: coresight: catu: Plug in CATU as a backend for ETR buffer

Now that we can use a CATU with a scatter gather table, add support
for the TMC ETR to make use of the connected CATU in translate mode.
This is done by adding CATU as new buffer mode.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(Upstream commit 434d611cddef1ceed32bf416a363992b01a3ff9a).

Bug: 140266694
Change-Id: I2649242040ab4c1e6be92efd122e0a57e1354b19
Signed-off-by: Yabin Cui <yabinc@google.com>