ARM: dts: qcom: Add msm8974 CoreSight components

Add initial set of CoreSight components found on Qualcomm
msm8974 and apq8074 based platforms, including the APQ8074
Dragonboard board.

Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>