net: hns3: the pointer is cast to another pointer in a different type, which is incompatible.

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

----------------------------

The type of desc.date is __le32, must change to cpu endian
before use.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: Junxin Chen <chenjunxin1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>