perf vendor events intel: Add uncore events for Broadwell DE

This is not a full uncore event list, but a short list of useful
and understandable metrics.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/n/tip-c0cix4eprbldfrx5zf60suvh@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>