x86: Move efi .S files into the 'lib' directory

These files now need to be in a standard place so that they can be located
by generic Makefile rules. Move them to the 'lib' directory.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/x86/config.mk b/arch/x86/config.mk
index a17abbb..12a8d73 100644
--- a/arch/x86/config.mk
+++ b/arch/x86/config.mk
@@ -46,7 +46,7 @@
 EFIPAYLOAD_BFDARCH = i386
 
 LDSCRIPT_EFI := $(srctree)/arch/x86/lib/elf_$(EFIARCH)_efi.lds
-EFISTUB := crt0-efi-$(EFIARCH).o reloc_$(EFIARCH).o
+EFISTUB := crt0_$(EFIARCH)_efi.o reloc_$(EFIARCH)_efi.o
 OBJCOPYFLAGS_EFI += --target=efi-app-$(EFIARCH)
 
 CPPFLAGS_REMOVE_crt0-efi-$(EFIARCH).o += $(CFLAGS_NON_EFI)