hinic3: Add ethtool basic ops

hinic3: Add ethtool basic ops

Implement following ethtool callback function:
.get_link_ksettings
.get_drvinfo
.get_msglevel
.set_msglevel
.get_link

  These callbacks allow users to utilize ethtool for detailed
network configuration and monitoring.

Co-developed-by: Zhu Yikai <zhuyikai1@h-partners.com>
Signed-off-by: Zhu Yikai <zhuyikai1@h-partners.com>
Signed-off-by: Fan Gong <gongfan1@huawei.com>
Link: https://patch.msgid.link/b56d490c2a06cae9541a0297d76b11d869f37161.1773062356.git.zhuyikai1@h-partners.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>