coresight-tmc: add support to configure flush and reset CTIs

Add support to map/unmap TMC flush and reset CTIs as part of
TMC enable/disable.

Change-Id: Icfb55f4cfaa944de396514e4792f88bcfb7eb7b6
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>
Signed-off-by: Mulu He <muluhe@codeaurora.org>