net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/airoha/airoha_eth.c"
                    ],
                    "versions": [
                        {
                            "version": "23020f04932701d5c8363e60756f12b43b8ed752",
                            "lessThan": "dba5f4959653e4c212beb746594952e8645d1115",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "23020f04932701d5c8363e60756f12b43b8ed752",
                            "lessThan": "f670fa4b19ceddc6d215dda4997888ccba9bbc61",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "23020f04932701d5c8363e60756f12b43b8ed752",
                            "lessThan": "d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "23020f04932701d5c8363e60756f12b43b8ed752",
                            "lessThan": "bde34e84edc8b5571fbde7e941e175a4293ee1eb",
                            "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/ethernet/airoha/airoha_eth.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.33",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.10",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }