vxlan: do not arm the ageing timer on a device that is down

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/vxlan/vxlan_core.c"
                    ],
                    "versions": [
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "be44d79d14d7f9ae7c8ffb7272142005341b5123",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "26c179d47403d2f919ee914cc02c31d896b59fee",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "9dc561f0522c35bdd66e0646a748814a138ec4ca",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "619dd29045e439d0b0f8c6d4fec1af447a050680",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "6b095e99b9e67ea31f0c4b00260e010898253519",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "46bb297ad77680e009244f067f27d51cf5b8c7cf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "6b4119af544996a545cf84b16f1dbce829ba0de8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40051c4dcad5b374156ad9cceae8d15c0ef1cb95",
                            "lessThan": "b37971686ec59fb027fa4910ba16805e68fddb97",
                            "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/vxlan/vxlan_core.c"
                    ],
                    "versions": [
                        {
                            "version": "5.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.152",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.104",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.45",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.9",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }