powerpc/kvm: no need to initialise statics to 0

Static variables do not need to be initialised to 0, because compiler
will initialise all uninitialised statics to 0. Thus, remove the
unneeded initialization.
Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211220030243.603435-1-wangborong@cdjrlc.com

arch/powerpc/kvm/book3s_64_mmu_host.c

@@ -228,7 +228,7 @@ static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid)
 	struct kvmppc_sid_map *map;
 	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
 	u16 sid_map_mask;
-	static int backwards_map = 0;
+	static int backwards_map;
 
 	if (kvmppc_get_msr(vcpu) & MSR_PR)
 		gvsid |= VSID_PR;