KVM: Convert PIC lock from raw spinlock to ordinary spinlock

The PIC code used to be called from preempt_disable() context, which
wasn't very good for PREEMPT_RT.  That is no longer the case, so move
back from raw_spinlock_t to spinlock_t.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h
index 63c3145..ba910d1 100644
--- a/arch/x86/kvm/irq.h
+++ b/arch/x86/kvm/irq.h
@@ -60,7 +60,7 @@
 };
 
 struct kvm_pic {
-	raw_spinlock_t lock;
+	spinlock_t lock;
 	bool wakeup_needed;
 	unsigned pending_acks;
 	struct kvm *kvm;