coresight-tpdm: Add support for cycle accuracy for cmb/mcmb

Add support to configure cmb/mcmb TPDM in cycle accurate mode.
Override the current cmb_mode node to support cycle accurate
mode as well.

Change-Id: I9497ebcbea955a24f4b30242fe38a562b1069718
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>