x86_64: Set K8 CPUID flag for K8/Fam10h/Fam11h

Previously this flag was only used on 32bit, but some shared code can use
it now.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/x86_64/kernel/setup.c

@@ -608,6 +608,9 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 	else
 		num_cache_leaves = 3;
 
+	if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11)
+		set_bit(X86_FEATURE_K8, &c->x86_capability);
+
 	/* RDTSC can be speculated around */
 	clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);