x86: Use a common bus clock for Intel CPUs

Modern Intel CPUs use a standard bus clock value of 100MHz, so put this in
a common file and tidy up the copies.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/ivybridge/model_206ax.c b/arch/x86/cpu/ivybridge/model_206ax.c
index ed66d2d..3177ba3 100644
--- a/arch/x86/cpu/ivybridge/model_206ax.c
+++ b/arch/x86/cpu/ivybridge/model_206ax.c
@@ -346,7 +346,7 @@
 	msr_write(MSR_IA32_PERF_CTL, perf_ctl);
 
 	debug("model_x06ax: frequency set to %d\n",
-	      ((perf_ctl.lo >> 8) & 0xff) * SANDYBRIDGE_BCLK);
+	      ((perf_ctl.lo >> 8) & 0xff) * INTEL_BCLK_MHZ);
 }
 
 static void set_energy_perf_bias(u8 policy)
@@ -418,7 +418,7 @@
 
 static int model_206ax_get_info(struct udevice *dev, struct cpu_info *info)
 {
-	return cpu_intel_get_info(info, SANDYBRIDGE_BCLK);
+	return cpu_intel_get_info(info, INTEL_BCLK_MHZ);
 
 	return 0;
 }