python-ethtool from home:orcharhino:sles_15_py3 project

对于 15.4，请以根用户 root 运行下面命令：

zypper addrepo https://download.opensuse.org/repositories/home:orcharhino:sles_15_py3/15.4/home:orcharhino:sles_15_py3.repo
zypper refresh
zypper install python-ethtool