drm/xe/pf: Clear all LMTT pages on alloc

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/xe/xe_lmtt.c"
                    ],
                    "versions": [
                        {
                            "version": "b1d20405821812ad70d95eefe58cadc6d50b0917",
                            "lessThan": "ff4b8c9ade1b82979fdd01e6f45b60f92eed26d8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b1d20405821812ad70d95eefe58cadc6d50b0917",
                            "lessThan": "5d21892c2e15b6a27f8bc907693eca7c6b7cc269",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b1d20405821812ad70d95eefe58cadc6d50b0917",
                            "lessThan": "705a412a367f383430fa34bada387af2e52eb043",
                            "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/gpu/drm/xe/xe_lmtt.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.39",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.7",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }