perf report: Update sort key state from -F option

perf report: Update sort key state from -F option

Factor out __sort_dimension__update() so that it can be called from -s
and -F option parsing logics.  Otherwise the following command cannot go
into the annotation mode.

  $ perf report -F overhead,type,sym

  Warning: Annotation is only available for symbolic views, include "sym*" in --sort to use it.

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>