ice: Fix PTP NULL pointer dereference during VSI rebuild

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/intel/ice/ice_main.c",
                        "drivers/net/ethernet/intel/ice/ice_ptp.c",
                        "drivers/net/ethernet/intel/ice/ice_ptp.h"
                    ],
                    "versions": [
                        {
                            "version": "803bef817807d2d36c930dada20c96fffae0dd19",
                            "lessThan": "ba0c7fff6616025a7d3a9e887e7ce16b06dc34b9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "803bef817807d2d36c930dada20c96fffae0dd19",
                            "lessThan": "7565d4df66b6619b50dc36618d8b8f1787d77e19",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "803bef817807d2d36c930dada20c96fffae0dd19",
                            "lessThan": "fc6f36eaaedcf4b81af6fe1a568f018ffd530660",
                            "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/intel/ice/ice_main.c",
                        "drivers/net/ethernet/intel/ice/ice_ptp.c",
                        "drivers/net/ethernet/intel/ice/ice_ptp.h"
                    ],
                    "versions": [
                        {
                            "version": "6.9",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.9",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.80",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.10",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }