selftests: kvm: Simplify loop in kvm_create_max_vcpus test

On kvm_create_max_vcpus test remove unneeded local
variable in the loop that add vcpus to the VM.
Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/kvm_create_max_vcpus.c

@@ -29,12 +29,9 @@ void test_vcpu_creation(int first_vcpu_id, int num_vcpus)
 
 	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
 
-	for (i = 0; i < num_vcpus; i++) {
-		int vcpu_id = first_vcpu_id + i;
-
+	for (i = first_vcpu_id; i < first_vcpu_id + num_vcpus; i++)
 		/* This asserts that the vCPU was created. */
-		vm_vcpu_add(vm, vcpu_id);
-	}
+		vm_vcpu_add(vm, i);
 
 	kvm_vm_free(vm);
 }