coresight: etm4x: Use TRCDEVARCH for component discovery

coresight: etm4x: Use TRCDEVARCH for component discovery

We have been using TRCIDR1 for detecting the ETM version. This
is in preparation for the future IP support.

Link: https://lore.kernel.org/r/20210110224850.1880240-20-suzuki.poulose@arm.com
Cc: Mike Leach <mike.leach@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/20210201181351.1475223-22-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>