[PATCH] net/af_xdp: update docs with libxdp requirements and info

[Ferruh Yigit]

On 2/11/2022 3:03 PM, Ciara Loftus wrote:
> When libxdp is used, the LIBXDP_OBJECT_PATH environment variable must be
> set to the location of where libxdp placed its bpf object files. This is
> usually in /usr/local/lib/bpf or /usr/local/lib64/bpf. Failure to do so
> will result in the PMD not initialising correctly as the bpf program is
> not found. Document this requirement.
> 
> Also, mention that the following logs which are generated on application
> launch can be ignored:
> 
>    libbpf: elf: skipping unrecognized data section(7) .xdp_run_config
>    libbpf: elf: skipping unrecognized data section(8) xdp_metadata
> 
> Signed-off-by: Ciara Loftus <ciara.loftus at intel.com>

Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>

Applied to dpdk-next-net/main, thanks.