x86/kvm/guest: Fix sparse warning: "symbol 'klock_waiting' was not declared as static"

It was not declared as static since it was thought to be used by
pv-flushtlb earlier.

Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: <gleb@redhat.com>
Cc: <pbonzini@redhat.com>
Cc: Jiri Kosina <trivial@kernel.org>
Link: http://lkml.kernel.org/r/1376645921-8056-1-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/kernel/kvm.c

@@ -529,7 +529,7 @@ arch_initcall(activate_jump_labels);
 #ifdef CONFIG_PARAVIRT_SPINLOCKS
 
 /* Kick a cpu by its apicid. Used to wake up a halted vcpu */
-void kvm_kick_cpu(int cpu)
+static void kvm_kick_cpu(int cpu)
 {
 	int apicid;
 	unsigned long flags = 0;