x86: Don't build some unused objects in TPL

In the future if we have separate symbols for DM_SPI_FLASH and
SPL_DM_SPI_FLASH we will not always have function declarations available
for some DM calls.  This in turn leads to build warnings but not
failures as the code isn't used and is discarded at link time.
Restructure things to not build code we won't use for TPL anyways.

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

arch/x86/cpu/apollolake/Makefile

@@ -3,7 +3,6 @@
 # Copyright 2019 Google LLC
 
 obj-$(CONFIG_SPL_BUILD) += cpu_spl.o
-obj-$(CONFIG_SPL_BUILD) += spl.o
 obj-$(CONFIG_SPL_BUILD) += systemagent.o
 obj-y += cpu_common.o
 
@@ -12,6 +11,7 @@ obj-y += cpu.o
 obj-y += punit.o
 obj-y += fsp_bindings.o
 ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
 obj-y += fsp_m.o
 endif
 endif

arch/x86/lib/Makefile

@@ -22,7 +22,6 @@ obj-y	+= init_helpers.o
 obj-y	+= interrupts.o
 obj-y	+= lpc-uclass.o
 obj-y	+= mpspec.o
-obj-$(CONFIG_ENABLE_MRC_CACHE) += mrccache.o
 obj-y	+= northbridge-uclass.o
 obj-$(CONFIG_I8259_PIC) += i8259.o
 obj-$(CONFIG_I8254_TIMER) += i8254.o
@@ -45,9 +44,12 @@ ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_CMD_ZBOOT)	+= zimage.o
 endif
 obj-$(CONFIG_USE_HOB) += hob.o
+ifndef CONFIG_TPL_BUILD
+obj-$(CONFIG_ENABLE_MRC_CACHE) += mrccache.o
 obj-$(CONFIG_HAVE_FSP) += fsp/
 obj-$(CONFIG_FSP_VERSION1) += fsp1/
 obj-$(CONFIG_FSP_VERSION2) += fsp2/
+endif
 
 ifdef CONFIG_SPL_BUILD
 ifdef CONFIG_TPL_BUILD