perf report: Use al->cpumode where applicable

We don't need to recalculate cpumode from the perf_event->header field,
as this is already available in the struct addr_location->cpumode field.

Remove the function signature of functions that receive both perf_event
and addr_location parameters but use perf_event just to extract the
cpumode.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-tmct07y7mka54allj82trlnx@git.kernel.org


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