UPSTREAM: coresight: platform: Fix leaking device reference

We don't drop the reference on the remote device while parsing the
connection, held by bus_find_device(). Fix this by duplicating the
device name and dropping the reference.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Kim Phillips <kim.phillips@arm.com>
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 5111e749c775ebae6f7d39c6f836cb3f06c7b938).

Bug: 140266694
Change-Id: I99c2664ba29a88250db8f03c2d22dea59f29ded3
Signed-off-by: Yabin Cui <yabinc@google.com>