UPSTREAM: coresight: tmc-etr: Check if non-secure access is enabled

CoreSight TMC-ETR must have the non-secure invasive debug access
enabled for use by self-hosted tracing. Without it, there is no
point in enabling the ETR. So, let us check it in the TMC_AUTHSTATUS
register and fail the probe if it is disabled.

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>
Link: https://lore.kernel.org/r/20190829202842.580-7-mathieu.poirier@linaro.org


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

(Upstream commit 8a4bc4f195044004520e38da7b8a52a76ccc9945).

Bug: 140266694
Change-Id: I85816c0a336f4328896ffc0ea3311fbf3870f803
Signed-off-by: Yabin Cui <yabinc@google.com>