coresight: tmc: Configure cti trigger number in device tree

Configure flush and reset cti trigger number in device tree.
Replace configuring cti trigger number by hard code since some
platforms don't have same cti trigger number.

Change-Id: Ib26802b3bd3449566954752b100d6ea188e98e13
Signed-off-by: Tao,Zhang <taozha@codeaurora.org>