net: hns3: fixed vf get max channels bug

Currently, the queried maximum of vf channels is the maximum of channels
supported by each TC. However, the actual maximum of channels is
the maximum of channels supported by the device.

Fixes: 849e4607 ("net: hns3: add ethtool_ops.get_channels support for VF")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250722125423.1270673-4-shaojijie@huawei.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>