target/arm: Restrict KVM-specific fields from ArchCPU

These fields shouldn't be accessed when KVM is not available.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230405160454.97436-8-philmd@linaro.org>
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 00e675f..4d6c0f9 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -961,6 +961,7 @@
      */
     uint32_t kvm_target;
 
+#ifdef CONFIG_KVM
     /* KVM init features for this CPU */
     uint32_t kvm_init_features[7];
 
@@ -973,6 +974,7 @@
 
     /* KVM steal time */
     OnOffAuto kvm_steal_time;
+#endif /* CONFIG_KVM */
 
     /* Uniprocessor system with MP extensions */
     bool mp_is_up;