[PATCH] OProfile: don't assume MSRs stay the same across CPU models

The MSRs might change between CPU models, error out if we haven't met
the CPU before. From Venkatesh Pallipadi

arch/i386/oprofile/nmi_int.c

@@ -332,6 +332,9 @@ static int __init ppro_init(void)
 {
 	__u8 cpu_model = current_cpu_data.x86_model;
 
+	if (cpu_model > 0xd)
+		return 0;
+
 	if (cpu_model > 5) {
 		nmi_ops.cpu_type = "i386/piii";
 	} else if (cpu_model > 2) {