[RFC] eal: remove support for I/O port

[Stephen Hemminger]

On Tue,  8 Apr 2025 11:30:32 -0700
Stephen Hemminger <stephen at networkplumber.org> wrote:

> In early days of virtio, the x86 I/O instructions were used
> to ring the doorbell for host access. To support these DPDK
> needed to enable IO access. This is no longer necessary and
> the vestiage can be marked deprecated.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---

Not yet, FreeBSD still uses it and the virtio support still needs it.
Really needs to go since many kernels fully block userspace to I/O
because it allows unrestricted access to hardware.