net: ena: remove devm from ethtool

There's no need for devm bloat here. In addition, these are freed right
before the function exits.

Also swapped kcalloc order for consistency.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Shay Agroskin <shayagr@amazon.com>
Link: https://patch.msgid.link/20241101214828.289752-2-rosenp@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>