KVM: EVENTFD: remove inclusion of irq.h

No more needed. irq.h would be void on ARM.
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

virt/kvm/eventfd.c

@@ -36,7 +36,6 @@
 #include <linux/seqlock.h>
 #include <trace/events/kvm.h>
 
-#include "irq.h"
 #include "iodev.h"
 
 #ifdef CONFIG_HAVE_KVM_IRQFD