block.c: rename (DIS)ALLOW to BPF_(DIS)ALLOW

Makes things clearer.
Prep work for a better shared bpf_net_helpers.h header file.

Generated via:
  sed -i -r 's@ ALLOW@ BPF_ALLOW@' block.c
  sed -i -r 's@ DISALLOW@ BPF_DISALLOW@' block.c

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I089a730d8881d62871ce2daff64e79caccd41a00
1 file changed