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CCI400 has a set of counters that can be used to profile different transations at CCI master and slave interfaces. These counters can observe different kinds of transations passing through the CCI and provide a system-level view of activity. This patch adds support for CCI PMU by extending the existing CCI driver. Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Jon Medhurst <tixy@linaro.org>