net: hns3: remove unnecessary 'ret' variable in hclge_misc_err_recovery()

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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

This removes an unnecessary variable 'ret' in
hclge_misc_err_recovery()

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: shenhao <shenhao21@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>