perf symbols: Remove unused dso__load_all_kallsyms() 'map' parameter

perf symbols: Remove unused dso__load_all_kallsyms() 'map' parameter

Only the 'dso' is needed, so ditch the struct used to pass (map, dso),
passing just the used 'dso' pointer.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-17a4gkk1cs4up4smkviymi2g@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>