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If the CPU implements Arm v8.4 Trace filter controls (FEAT_TRF),
move the ETM to trace prohibited region using TRFCR, while disabling.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20210405164307.1720226-9-suzuki.poulose@arm.com

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>