bpf: call finalize() from its callback in struct bpf_offload_dev

bpf: call finalize() from its callback in struct bpf_offload_dev

In a way similar to the change previously brought to the verify_insn
hook, switch to the newly added ops in struct bpf_prog_offload for
calling the functions used to perform final verification steps for
offloaded programs.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>