efi: Build the 64-bit app properly

Now that the linker crash is resolved, build the 64-bit EFI app, including
all the required code.

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

Makefile

@@ -1781,9 +1781,9 @@ else
 quiet_cmd_u-boot__ ?= LD      $@
       cmd_u-boot__ ?= $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_u-boot) -o $@		\
 		-T u-boot.lds $(u-boot-init)					\
-		$(if $(CONFIG_EFI_APP_64BIT),,--whole-archive)			\
+		--whole-archive							\
 			$(u-boot-main)						\
-		$(if $(CONFIG_EFI_APP_64BIT),,--no-whole-archive)		\
+		--no-whole-archive						\
 		$(PLATFORM_LIBS) -Map u-boot.map;				\
 		$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
 endif