ARM: UniPhier: add empty lowlevel_init to U-boot proper

To remove the ifdef conditional of CONFIG_SKIP_LOWLEVEL_INIT,
add late_lowlevel_init.S to U-Boot proper.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/Makefile b/arch/arm/mach-uniphier/Makefile
index e7a801b..f191aa3 100644
--- a/arch/arm/mach-uniphier/Makefile
+++ b/arch/arm/mach-uniphier/Makefile
@@ -12,6 +12,7 @@
 
 else
 
+obj-y += late_lowlevel_init.o
 obj-$(CONFIG_BOARD_EARLY_INIT_F) += board_early_init_f.o
 obj-$(CONFIG_DISPLAY_CPUINFO) += cpu_info.o
 obj-$(CONFIG_MISC_INIT_F) += print_misc_info.o