Rename tcg_cpu_exec and tcg_has_work

These functions are also used for kvm under !CONFIG_IOTHREAD, having
'tcg' in their name is just misleading.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
diff --git a/vl.c b/vl.c
index 8a5de9f..ba6ee11 100644
--- a/vl.c
+++ b/vl.c
@@ -1325,7 +1325,7 @@
             int64_t ti;
 #endif
 #ifndef CONFIG_IOTHREAD
-            nonblocking = tcg_cpu_exec();
+            nonblocking = cpu_exec_all();
 #endif
 #ifdef CONFIG_PROFILER
             ti = profile_getclock();