Correct SPL use of EFI_DEVICE_PATH_UTIL

This converts 1 usage of this option to the non-SPL form, since there is
no SPL_EFI_DEVICE_PATH_UTIL defined in Kconfig

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/efi_loader/efi_root_node.c b/lib/efi_loader/efi_root_node.c
index a4eb6f4..09699b2 100644
--- a/lib/efi_loader/efi_root_node.c
+++ b/lib/efi_loader/efi_root_node.c
@@ -58,7 +58,7 @@
 		 &efi_guid_device_path_to_text_protocol,
 		 &efi_device_path_to_text,
 #endif
-#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_UTIL)
+#if IS_ENABLED(CONFIG_EFI_DEVICE_PATH_UTIL)
 		 /* Device path utilities protocol */
 		 &efi_guid_device_path_utilities_protocol,
 		 &efi_device_path_utilities,