octeontx2-pf: fix error handling of devlink port in rvu_rep_create()

Unregister the devlink port when register_netdev() fails.

Fixes: 9ed0343f ("octeontx2-pf: Add devlink port support")
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Link: https://patch.msgid.link/20241217052326.1086191-2-harshit.m.mogalapalli@oracle.com


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