powerpc: fix compilation with CONFIG_FDT undefined

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
diff --git a/hw/ppc440_bamboo.c b/hw/ppc440_bamboo.c
index dce3721..40e463b 100644
--- a/hw/ppc440_bamboo.c
+++ b/hw/ppc440_bamboo.c
@@ -33,22 +33,20 @@
                                      target_phys_addr_t initrd_size,
                                      const char *kernel_cmdline)
 {
-    void *fdt = NULL;
+    int ret = -1;
 #ifdef CONFIG_FDT
     uint32_t mem_reg_property[] = { 0, 0, ramsize };
     char *filename;
     int fdt_size;
-    int ret;
+    void *fdt;
 
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
-        ret = -1;
         goto out;
     }
     fdt = load_device_tree(filename, &fdt_size);
     qemu_free(filename);
     if (fdt == NULL) {
-        ret = -1;
         goto out;
     }
 
diff --git a/hw/ppce500_mpc8544ds.c b/hw/ppce500_mpc8544ds.c
index fd428fa..2500817 100644
--- a/hw/ppce500_mpc8544ds.c
+++ b/hw/ppce500_mpc8544ds.c
@@ -78,22 +78,20 @@
                                      target_phys_addr_t initrd_size,
                                      const char *kernel_cmdline)
 {
-    void *fdt = NULL;
+    int ret = -1;
 #ifdef CONFIG_FDT
     uint32_t mem_reg_property[] = {0, ramsize};
     char *filename;
     int fdt_size;
-    int ret;
+    void *fdt;
 
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
-        ret = -1;
         goto out;
     }
     fdt = load_device_tree(filename, &fdt_size);
     qemu_free(filename);
     if (fdt == NULL) {
-        ret = -1;
         goto out;
     }