net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/cadence/macb_main.c"
                    ],
                    "versions": [
                        {
                            "version": "78d901897b3cae06b38f54e48a2378cf9da21175",
                            "lessThan": "bda487567d0b7b15dfa876511085c0666b9efad5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78d901897b3cae06b38f54e48a2378cf9da21175",
                            "lessThan": "259e6cbb6a097da8ced544ee92a6fbde35aa1338",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78d901897b3cae06b38f54e48a2378cf9da21175",
                            "lessThan": "23d42b9a3bcd55b17d3b371544fedc708c2397e9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "982a4d9a2e12b693f684eff943043a607628d871",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.17.3",
                            "lessThan": "6.18",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/cadence/macb_main.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.55",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.9",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }