PPC: KVM: Synchronize regs on CPU dump

When we dump the CPU registers, there's a certain chance they haven't been
synchronized with KVM yet, so we have to manually trigger that.

This aligns the code with x86 and fixes a bug where the register state was
bogus on invalid/unknown kvm exit reasons.
Reported-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAlexander Graf <agraf@suse.de>

target-ppc/translate.c

@@ -9319,6 +9319,8 @@ void cpu_dump_state (CPUPPCState *env, FILE *f, fprintf_function cpu_fprintf,
 
     int i;
 
+    cpu_synchronize_state(env);
+
     cpu_fprintf(f, "NIP " TARGET_FMT_lx "   LR " TARGET_FMT_lx " CTR "
                 TARGET_FMT_lx " XER " TARGET_FMT_lx "\n",
                 env->nip, env->lr, env->ctr, env->xer);