libipt, block: always forward enabled events
libipt, block: always forward enabled events

Tracing enabled events are sometimes indicated by setting the enabled flag in
struct pt_block and sometimes by forwarding the event to ther user.

Always forward the event and process it in pt_blk_event().  Once we did this for
all events, it will simplify both the decoder and the API.

Change-Id: Ibf5a5e75c7d98816c1af52f24acca035898ed7a0
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

01org/processor-trace,01org/processor-trace,01org/processor-trace