Let the compiler decide instead.

No change in object size x86-64 -O2 no profiling
Signed-off-by: NJoe Perches <joe@perches.com>
Suggested-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>