net: ibm: emac: zmii: devm_platform_get_resource

Simplifies the probe function by a bit and allows removing the _remove
function such that devm now handles all cleanup.

printk gets converted to dev_err as np is now gone.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20241030203727.6039-10-rosenp@gmail.com


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