x86/cpu: Use MSR_IA32_MISC_ENABLE constants

Instead of the magic numbers 1<<11 and 1<<12 use the constants
from msr-index.h.  This makes it obvious where those bits
of MSR_IA32_MISC_ENABLE are consumed (and in fact that Linux
consumes them at all) to simple minds that grep for
MSR_IA32_MISC_ENABLE_.*_UNAVAIL.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220719174714.2410374-1-pbonzini@redhat.com

arch/x86/kernel/cpu/intel.c

@@ -647,9 +647,9 @@ static void init_intel(struct cpuinfo_x86 *c)
 		unsigned int l1, l2;
 
 		rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
-		if (!(l1 & (1<<11)))
+		if (!(l1 & MSR_IA32_MISC_ENABLE_BTS_UNAVAIL))
 			set_cpu_cap(c, X86_FEATURE_BTS);
-		if (!(l1 & (1<<12)))
+		if (!(l1 & MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL))
 			set_cpu_cap(c, X86_FEATURE_PEBS);
 	}