Merge branch 'bpf-libbpf-int-btf-map'

Merge branch 'bpf-libbpf-int-btf-map'

Andrii Nakryiko says:

====================
This patch set implements an update to how BTF-defined maps are specified. The
change is in how integer attributes, e.g., type, max_entries, map_flags, are
specified: now they are captured as part of map definition struct's BTF type
information (using array dimension), eliminating the need for compile-time
data initialization and keeping all the metadata in one place.

All existing selftests that were using BTF-defined maps are updated, along
with some other selftests, that were switched to new syntax.

v4->v5:
- revert sample_map_ret0.c, which is loaded with iproute2 (kernel test robot);
v3->v4:
- add acks;
- fix int -> uint type in commit message;
v2->v3:
- rename __int into __uint (Yonghong);
v1->v2:
- split bpf_helpers.h change from libbpf change (Song).
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>