multilib_header: Fall back to worsize form libc for bpf target
Setting bpf to use 64bit for wordlength is not right, it happens to
work perhaps becuase the targets its being run on are 64bit inherently
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>