x86: Add init for model 206AX CPU

Add the setup code for the CPU so that it can be used at full speed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 6027d59..2cbb270 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -326,6 +326,8 @@
 #define MSR_AMD_PERF_STATUS		0xc0010063
 #define MSR_AMD_PERF_CTL		0xc0010062
 
+#define MSR_PMG_CST_CONFIG_CTL		0x000000e2
+#define MSR_PMG_IO_CAPTURE_ADR		0x000000e4
 #define MSR_IA32_MPERF			0x000000e7
 #define MSR_IA32_APERF			0x000000e8