LoongArch: Fix memleak in pci_acpi_scan_root()

Add kfree(root_ops) in this case to avoid memleak of root_ops,
leaks when pci_find_bus() != 0.
Signed-off-by: Yuli Wang <wangyuli@uniontech.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/pci/acpi.c

@@ -225,6 +225,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	if (bus) {
 		memcpy(bus->sysdata, info->cfg, sizeof(struct pci_config_window));
 		kfree(info);
+		kfree(root_ops);
 	} else {
 		struct pci_bus *child;