cxl/features: Reject Set Features output buffer smaller than the header

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/cxl/core/features.c"
                    ],
                    "versions": [
                        {
                            "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
                            "lessThan": "1281dc84c81577b51e2b61c24617c9f44b2cdb99",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
                            "lessThan": "16b7c99eff030c6ea11ca24efa4b9f989cc74093",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
                            "lessThan": "cde18d6c1d913a67ab0afd3d9475ece4be79da50",
                            "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/cxl/core/features.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "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"
                        }
                    ]
                }