x86: apl: Add a CPU driver

Add a bare-bones CPU driver so that CPUs can be probed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 79a9369..246c14f 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -70,6 +70,7 @@
 #define MSR_IA32_BBL_CR_CTL		0x00000119
 #define MSR_IA32_BBL_CR_CTL3		0x0000011e
 #define MSR_POWER_MISC			0x00000120
+#define  FLUSH_DL1_L2			(1 << 8)
 #define ENABLE_ULFM_AUTOCM_MASK		(1 << 2)
 #define ENABLE_INDP_AUTOCM_MASK		(1 << 3)