efi: Move some load-options handling into the common dir

These functions are useful for the app as well as the loader.

For now, efi_set_load_options() calls efi_search_protocol() which is
still in the loader, but we can provide an 'app' version when needed. It
doesn't seem worth keeping that one function in a separate file.

Signed-off-by: Simon Glass <sjg@chromium.org>

lib/efi/Makefile

@@ -6,5 +6,6 @@
 obj-y += basename.o
 obj-y += device_path.o
 obj-y += helper.o
+obj-y += load_options.o
 obj-y += memory.o
 obj-y += run.o

lib/efi_loader/Makefile

@@ -38,7 +38,6 @@ obj-y += efi_fdt.o
 obj-y += efi_file.o
 obj-$(CONFIG_EFI_LOADER_HII) += efi_hii.o efi_hii_config.o
 obj-y += efi_image_loader.o
-obj-y += efi_load_options.o
 obj-$(CONFIG_EFI_LOG) += efi_log.o
 obj-y += efi_memory.o
 obj-y += efi_root_node.o