x86: broadwell: Select refcode and CPU code for SPL

Allow broadwell to build for SPL and include the reference code.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/broadwell/Makefile

@@ -3,13 +3,14 @@
 # Copyright (c) 2016 Google, Inc
 
 obj-y += adsp.o
-obj-y += cpu.o
-obj-y += cpu_full.o
+obj-$(CONFIG_$(SPL_TPL_)X86_16BIT_INIT) += cpu.o
+obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += cpu_full.o
 
 ifdef CONFIG_SPL
 ifndef CONFIG_SPL_BUILD
 obj-y += cpu_from_spl.o
 obj-y += cpu_full.o
+obj-y += refcode.o
 endif
 ifndef CONFIG_SPL_BUILD
 # obj-y += cpu_from_spl.o
@@ -27,6 +28,6 @@ obj-y += northbridge.o
 obj-y += pch.o
 obj-y += pinctrl_broadwell.o
 obj-y += power_state.o
-obj-y += refcode.o
+obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += refcode.o
 obj-y += sata.o
 obj-$(CONFIG_$(SPL_TPL_)X86_32BIT_INIT) += sdram.o