net/hns3: remove unnecessary zero assignments
net/hns3: remove unnecessary zero assignments

The output parameter 'cap' was cleared at the function entry, the
latter zero assignment 'cap' fields was unnecessary, so delete them.

Fixes: c09c7847d892 ("net/hns3: support traffic management")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <af69652d70a703aa3bb4268f61750255b6f8fb91@huawei.com>
Signed-off-by: Min Hu (Connor) <f02e10cb0a484c51b0f8634f83fbb4ab9ded1c6a@huawei.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk