wifi: mt76: mt7996: do not attach hif2 WED when the main WED attach failed

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/wireless/mediatek/mt76/mt7996/mmio.c"
                    ],
                    "versions": [
                        {
                            "version": "83eafc9251d6d30574b629ac637c56d168fcbdd9",
                            "lessThan": "9d1fd637336588d8118c104a025eca1341d9ec85",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "83eafc9251d6d30574b629ac637c56d168fcbdd9",
                            "lessThan": "76144da3c6184c7850631ad79d0600ac8bf7649a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "83eafc9251d6d30574b629ac637c56d168fcbdd9",
                            "lessThan": "d566387df8306257d2f703a0d99fd9896400317e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "83eafc9251d6d30574b629ac637c56d168fcbdd9",
                            "lessThan": "7c1924332e986019c6bcddf55c843361cccac73f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/wireless/mediatek/mt76/mt7996/mmio.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }