UPSTREAM: dt-bindings: arm: coresight: Add support for coresight-loses-context-with-cpu

Some coresight components, because of choices made during hardware
integration, require their state to be saved and restored across CPU low
power states.

The software has no reliable method of detecting when save/restore is
required thus let's add a binding to inform the kernel.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20191104181251.26732-3-mathieu.poirier@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(Upstream commit b7909065e8ebaffd80375d01f5d151ff59b59ce6).

Bug: 140266694
Change-Id: If246eaf51410a623e3f00d883069f10ad030f6a1
Signed-off-by: Yabin Cui <yabinc@google.com>