perf tools: Split event symbols arrays to hw and sw parts

perf tools: Split event symbols arrays to hw and sw parts

It'll be convenient in upcoming patch to access hw event symbols
strings via enum perf_hw_id indexes. In order not to duplicate
the data, creating two separate arrays:

  event_symbols_hw for enum perf_hw_id events
  event_symbols_sw for enum perf_sw_ids events

Changing the current event list code to follow the change.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1341352848-11833-7-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>