net: hns3: add debug information for flow table when failed

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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Add some debug information for processing flow table if failed.

Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: shenhao <shenhao21@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>