UPSTREAM: coresight: etm4x: Skip selector pair 0

Resource selector pair 0 is always implemented and reserved.  As such
it should not be explicitly programmed.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(Upstream commit 8013f32a1b352f810cc2acfb00317df2ae3c5dee).

Bug: 140266694
Change-Id: I5ab0fd659e0a2bd2bcdd4eaad4fc8d905b378ad8
Signed-off-by: Yabin Cui <yabinc@google.com>