nb/intel/fsp_rangeley: Use MSR_PLATFORM_INFO instead of 0xce

Change-Id: Ifb8aa43b6545482bc7fc136a90c4bbaa18d46089
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/22957
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/cpu/x86/tsc.h

@@ -11,6 +11,8 @@
 #define TSC_SYNC
 #endif
 
+#define MSR_PLATFORM_INFO 0xce
+
 struct tsc_struct {
 	unsigned int lo;
 	unsigned int hi;

src/northbridge/intel/fsp_rangeley/udelay.c

@@ -43,7 +43,7 @@ void udelay(u32 us)
 	u32 fsb = 100, divisor;
 	u32 d;			/* ticks per us */
 
-	msr = rdmsr(0xce);
+	msr = rdmsr(MSR_PLATFORM_INFO);
 	divisor = (msr.lo >> 8) & 0xff;
 
 	d = fsb * divisor;