net: hns3: fix buffer length not enough problem in debugfs

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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

In hns3_dump_tx_bd_info(), some item have not enough space to
show the whole value.

In hclge_dbg_dump_mac_uc(), the max uc mac list is 3K, the max
memory of dumping uc mac is about 120KB, but now just give
64KB.

In hclge_dbg_dump_reg_tqp(), the max tqp number is 1K, the max
memory of dumping tqp regs is about 100KB, but not just give
64KB.

This patch fix them.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: li yongxin <liyongxin1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>