efi_loader: build with HII configuration protocol

Without the HII configuration protocol the debug version of the UEFI shell
cannot be used.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index ab50a69..cf050e5 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -37,7 +37,7 @@
 obj-y += efi_dt_fixup.o
 obj-y += efi_fdt.o
 obj-y += efi_file.o
-obj-$(CONFIG_EFI_LOADER_HII) += efi_hii.o
+obj-$(CONFIG_EFI_LOADER_HII) += efi_hii.o efi_hii_config.o
 obj-y += efi_image_loader.o
 obj-y += efi_load_options.o
 obj-y += efi_memory.o