efi: stub: Move the use_uart assignment immediately after exit_boot_services() call

The use_uart assignment should follow immediately after the call to
exit_boot_services(), in case we want some debug output after that.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

lib/efi/efi_stub.c

@@ -361,14 +361,14 @@ efi_status_t EFIAPI efi_main(efi_handle_t image,
 		}
 	}
 
+	/* The EFI UART won't work now, switch to a debug one */
+	use_uart = true;
+
 	map.version = version;
 	map.desc_size = desc_size;
 	add_entry_addr(priv, EFIET_MEMORY_MAP, &map, sizeof(map), desc, size);
 	add_entry_addr(priv, EFIET_END, NULL, 0, 0, 0);
 
-	/* The EFI UART won't work now, switch to a debug one */
-	use_uart = true;
-
 	memcpy((void *)CONFIG_SYS_TEXT_BASE, _binary_u_boot_bin_start,
 	       (ulong)_binary_u_boot_bin_end -
 	       (ulong)_binary_u_boot_bin_start);