CVE-2024-42158 s390/pkey: Use kfree_sensitive() to fix Coccinelle warnings

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/s390/crypto/pkey_api.c"
    ],
    "versions": [
      {
        "version": "e80d4af0a320972aac58e2004d0ba4e44ef4c5c7",
        "lessThan": "62151a0acde90823bdfa991d598c85cf4b1d387d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e80d4af0a320972aac58e2004d0ba4e44ef4c5c7",
        "lessThan": "22e6824622e8a8889df0f8fc4ed5aea0e702a694",
        "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/s390/crypto/pkey_api.c"
    ],
    "versions": [
      {
        "version": "4.11",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.11",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.9.9",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]