serial: sc16is7xx: fix TX fifo corruption

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tty/serial/sc16is7xx.c"
                    ],
                    "versions": [
                        {
                            "version": "4b068e55bf5ea7bab4d8a282c6a24b03e80c0b68",
                            "lessThan": "263682f5669ceeb70b14b4eda209fb34d67331ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9879e1bec3c0f077427dd0d258c80c63ce9babdf",
                            "lessThan": "2a0ba376cdf729b5c66226c65c6c7cf9de744d52",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4409df5866b7ff7686ba27e449ca97a92ee063c9",
                            "lessThan": "09cfe05e9907f3276887a20e267cc40e202f4fdd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4409df5866b7ff7686ba27e449ca97a92ee063c9",
                            "lessThan": "133f4c00b8b2bfcacead9b81e7e8edfceb4b06c4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dbe196ca489f3833e0f9eeb86ac346194f131c91",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.1.76",
                            "lessThan": "6.1.191",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.15",
                            "lessThan": "6.6.160",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.7.3",
                            "lessThan": "6.8",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tty/serial/sc16is7xx.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.191",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.10.5",
                            "lessThanOrEqual": "6.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.11",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }