Comment was wrong the config option is named CONFIG_MIPS_RAW_APPENDED_DTB

took the config name from the comment and used it in code.
Should have known better. comments are never right.

arch/mips/lantiq/grx500/prom.c

@@ -158,8 +158,8 @@ static void plat_early_init_devtree(void)
 	 * parsed resulting in our memory appearing
 	 */
 
-	if (fw_passed_dtb){ /* used by CONFIG_MIPS_APPENDED_RAW_DTB as well */
-#if defined(CONFIG_LTQ_EVA_1GB) &&  ! defined(CONFIG_MIPS_APPENDED_RAW_DTB)
+	if (fw_passed_dtb){ /* used by CONFIG_MIPS_RAW_APPENDED_DTB as well */
+#if defined(CONFIG_LTQ_EVA_1GB) &&  ! defined(CONFIG_MIPS_RAW_APPENDED_DTB)
 		/* in this option we have the kernel linked at 0x60000000 instead of 0x80000000 */
 		/* u-boot assumes the first one so pointer from u-boot is pointing to wrong address */
 		pr_info("Using Device tree (DTB) from bootloader %p (%p)\n", (void *)(fw_passed_dtb - 0x20000000), (void*)fw_passed_dtb);