KVM: remove kvm_guest_enter/exit wrappers

Use the functions from context_tracking.h directly.

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 6895e7b..c106488b 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -765,13 +765,13 @@
 
 	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
 	local_irq_disable();
-	kvm_guest_enter();
+	guest_enter_irqoff();
 	local_irq_enable();
 
 	rc = sie64a(scb_s, vcpu->run->s.regs.gprs);
 
 	local_irq_disable();
-	kvm_guest_exit();
+	guest_exit_irqoff();
 	local_irq_enable();
 	vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);