target/arm: Don't access TCG code when debugging with KVM

When TCG is disabled this part of the code should not be reachable, so
wrap it with an ifdef for now.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/target/arm/ptw.c b/target/arm/ptw.c
index 2b125ff..be0cc6b 100644
--- a/target/arm/ptw.c
+++ b/target/arm/ptw.c
@@ -254,6 +254,7 @@
         ptw->out_host = NULL;
         ptw->out_rw = false;
     } else {
+#ifdef CONFIG_TCG
         CPUTLBEntryFull *full;
         int flags;
 
@@ -270,6 +271,9 @@
         ptw->out_rw = full->prot & PAGE_WRITE;
         pte_attrs = full->pte_attrs;
         pte_secure = full->attrs.secure;
+#else
+        g_assert_not_reached();
+#endif
     }
 
     if (regime_is_stage2(s2_mmu_idx)) {