x86: Unify reserve_arch() for all x86 boards

Instead of asking each platform to provide reserve_arch(),
supply it in arch/x86/cpu/cpu.c in a unified way.

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

arch/x86/cpu/baytrail/valleyview.c

@@ -53,14 +53,6 @@ int arch_misc_init(void)
 	return 0;
 }
 
-int reserve_arch(void)
-{
-#ifdef CONFIG_ENABLE_MRC_CACHE
-	return mrccache_reserve();
-#else
-	return 0;
-#endif
-}
 #endif
 
 void reset_cpu(ulong addr)

arch/x86/cpu/broadwell/sdram.c

@@ -190,11 +190,6 @@ static int prepare_mrc_cache(struct pei_data *pei_data)
 	return 0;
 }
 
-int reserve_arch(void)
-{
-	return mrccache_reserve();
-}
-
 int dram_init(void)
 {
 	struct pei_data _pei_data __aligned(8);

arch/x86/cpu/cpu.c

@@ -29,6 +29,7 @@
 #include <asm/lapic.h>
 #include <asm/microcode.h>
 #include <asm/mp.h>
+#include <asm/mrccache.h>
 #include <asm/msr.h>
 #include <asm/mtrr.h>
 #include <asm/post.h>
@@ -751,3 +752,14 @@ int cpu_init_r(void)
 
 	return 0;
 }
+
+#ifndef CONFIG_EFI_STUB
+int reserve_arch(void)
+{
+#ifdef CONFIG_ENABLE_MRC_CACHE
+	return mrccache_reserve();
+#else
+	return 0;
+#endif
+}
+#endif

arch/x86/cpu/ivybridge/sdram.c

@@ -201,11 +201,6 @@ static int recovery_mode_enabled(void)
 	return false;
 }
 
-int reserve_arch(void)
-{
-	return mrccache_reserve();
-}
-
 static int copy_spd(struct udevice *dev, struct pei_data *peid)
 {
 	const void *data;

arch/x86/cpu/quark/quark.c

@@ -360,12 +360,3 @@ void board_final_cleanup(void)
 
 	return;
 }
-
-int reserve_arch(void)
-{
-#ifdef CONFIG_ENABLE_MRC_CACHE
-	return mrccache_reserve();
-#else
-	return 0;
-#endif
-}