net: hns3: fix pointer cast to different type for wol

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7A712


CVE: NA

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The pointer to decs.data is __le32 (*)[6], is incompatible to
"struct hclge_wol_cfg_cmd *". So fix the pointer cast to
correct type for decs.data.

Signed-off-by: Hao Lan <lanhao@huawei.com>