perf maps: Add missing map__set_kmap_maps() when replacing a kernel map

Since in this case __maps__insert_sorted() is not called and thus
doesn't have the opportunity to do the needed map__set_kmap_maps() calls on
the new map.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/lkml/Z7-May5w9VQd5QD0@x1
Link: https://lore.kernel.org/r/20250228211734.33781-6-acme@kernel.org


Signed-off-by: Namhyung Kim <namhyung@kernel.org>