net/tap: use local eBPF definitions

net/tap: use local eBPF definitions

eBPF has a graceful approach: it must successfully compile on all Linux
distributions. If a specific kernel cannot support eBPF it will gracefully
refuse the eBPF netlink message sent to it.
The kernel header file linux/bpf.h (if present) on different Linux
distributions may not include all definitions required for TAP
compilation.
In order to guarantee a successful eBPF compilation everywhere all the
required definitions for TAP have been locally added instead of including
file <linux/bpf.h>

Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
Tested-by: Harry van Haaren <harry.van.haaren@intel.com>