lib: fdt: fix indent of #ifdef..#endif conditional

Match the depth of indentation between #ifdef and #endif
for better readability.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NSimon Glass <sjg@chromium.org>

lib/fdtdec.c

@@ -1167,7 +1167,7 @@ int fdtdec_setup(void)
 #  else
 	/* FDT is at end of image */
 	gd->fdt_blob = (ulong *)&_end;
-#endif
+#  endif
 # elif defined(CONFIG_OF_HOSTFILE)
 	if (sandbox_read_fdt_from_file()) {
 		puts("Failed to read control FDT\n");