Make sure global arrays of bpf_rb_root and fields of bpf_rb_root in nested
struct types work correctly.
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Link: https://lore.kernel.org/r/20240523174202.461236-9-thinker.li@gmail.comSigned-off-by: Alexei Starovoitov <ast@kernel.org>