KVM: Remove base_addresss in kvm_pit since it is unused

The patch below removes unsigned long base_addresss; in i8254.h
since it is unused.
Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

arch/x86/kvm/i8254.h

@@ -33,7 +33,6 @@ struct kvm_kpit_state {
 };
 
 struct kvm_pit {
-	unsigned long base_addresss;
 	struct kvm_io_device dev;
 	struct kvm_io_device speaker_dev;
 	struct kvm *kvm;