CPU: Update ivybridge PP1 current limit value

The BWG says ivybridge current limit for PP1 is 50A.

Verify the PP1 current limit value on link device:

> echo $(( ( $(rdmsr 0 0x602) & 0x1fff ) >> 3 ))
50

Change-Id: I946269d21ef605f2525fe03993f569d69128294b
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1305
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/cpu/intel/model_206ax/model_206ax.h b/src/cpu/intel/model_206ax/model_206ax.h
index d482ff0..fbd57a5 100644
--- a/src/cpu/intel/model_206ax/model_206ax.h
+++ b/src/cpu/intel/model_206ax/model_206ax.h
@@ -75,7 +75,8 @@
 #define MSR_PP0_CURRENT_CONFIG		0x601
 #define  PP0_CURRENT_LIMIT		(112 << 3) /* 112 A */
 #define MSR_PP1_CURRENT_CONFIG		0x602
-#define  PP1_CURRENT_LIMIT		(35 << 3) /* 35 A */
+#define  PP1_CURRENT_LIMIT_SNB		(35 << 3) /* 35 A */
+#define  PP1_CURRENT_LIMIT_IVB		(50 << 3) /* 50 A */
 #define MSR_PKG_POWER_SKU_UNIT		0x606
 #define MSR_PKG_POWER_SKU		0x614
 #define MSR_PP0_POWER_LIMIT		0x638