KVM: PPC: Remove the tasklet used by the hrtimer

Powerpc timer implementation is a copycat version of s390. Now that they removed
the tasklet with commit ea74c0ea1b24a6978a6ebc80ba4dbc7b7848b32d follow this
optimization.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index b4e81e6..97ec5b7 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1822,10 +1822,8 @@
 	update_timer_ints(vcpu);
 }
 
-void kvmppc_decrementer_func(unsigned long data)
+void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 {
-	struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
-
 	if (vcpu->arch.tcr & TCR_ARE) {
 		vcpu->arch.dec = vcpu->arch.decar;
 		kvmppc_emulate_dec(vcpu);