ASoC: SOF: avoid a NULL dereference with unsupported widgets

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/soc/sof/ipc4-topology.c"
                    ],
                    "versions": [
                        {
                            "version": "3acd527089463742a3dd95e274d53c2fdd834716",
                            "lessThan": "d42fe2721111138d7656d4f621f38c171979c8a0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3acd527089463742a3dd95e274d53c2fdd834716",
                            "lessThan": "170818974e9732506195c6302743856cc8bdfd6f",
                            "status": "affected",
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                        },
                        {
                            "version": "3acd527089463742a3dd95e274d53c2fdd834716",
                            "lessThan": "e3720f92e0237921da537e47a0b24e27899203f8",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/soc/sof/ipc4-topology.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.11",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }