FreeBSD support is basically just very small changes related to
some different includes and one define to not hide non-standard defines
like B115200.
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
To fix the build after ppp_output_cb started taking it as const in
commit b2d1fc119d50f0f9a9f2edb784577f9ad6585fbe.
Fixes this failure:
../contrib/examples/ppp/pppos_example.c: In function ‘ppp_output_cb’:
../contrib/examples/ppp/pppos_example.c:163:29: error: cast discards ‘const’ qualifier from pointer target type [-Werror=cast-qual]
return sio_write(ppp_sio, (u8_t*)data, len);
^