wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work

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                        "drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c"
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                    "programFiles": [
                        "drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c"
                    ],
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                            "version": "5.15.153",
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                            "versionType": "original_commit_for_fix"
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