coresight: abort coresight tracing on kernel panic

Calling coresight_abort() on kernel panic will stop/disable the
current sink and dump other necessary info to aid post crash
analysis.

Change-Id: I9d1b0ab2ba9d1a665727ea436df0c906fc80dab7
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>