x86: ivybridge: Allow 32-bit init to move to SPL

Update the Makefile so that some 32-bit init can be built into SPL rather
than U-Boot proper.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/ivybridge/Makefile

@@ -7,12 +7,12 @@
 ifdef CONFIG_HAVE_FSP
 obj-y += fsp_configs.o ivybridge.o
 else
-obj-y += cpu.o
+obj-$(CONFIG_$(SPL_)X86_32BIT_INIT) += cpu.o
 obj-y += early_me.o
 obj-y += lpc.o
 obj-y += model_206ax.o
 obj-y += northbridge.o
 obj-y += sata.o
-obj-y += sdram.o
+obj-$(CONFIG_$(SPL_)X86_32BIT_INIT) += sdram.o
 endif
 obj-y += bd82x6x.o