[PATCH] drivers: remove unused build variable

[Bruce Richardson]

On Mon, Oct 31, 2022 at 11:44:44AM +0100, Thomas Monjalon wrote:
> The variable fmt_name has been removed from DPDK 21.02-rc1.
> Then some drivers were integrated in the same year with this variable.
> Of this course it has no effect, so it is cleaned up.
> 
> Fixes: 832a4cf1d11d ("compress/mlx5: introduce PMD")
> Fixes: a7c86884f150 ("crypto/mlx5: introduce Mellanox crypto driver")
> Fixes: 5e7596ba7cb3 ("vdpa/sfc: introduce Xilinx vDPA driver")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
> ---
Acked-by: Bruce Richardson <bruce.richardson at intel.com>