icount: set can_do_io outside TB execution

This patch sets can_do_io function to allow reading icount
within cpu-exec, but outside TB execution.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/cpus.c b/cpus.c
index 91119bb..615d4ae 100644
--- a/cpus.c
+++ b/cpus.c
@@ -935,6 +935,7 @@
     qemu_thread_get_self(cpu->thread);
     cpu->thread_id = qemu_get_thread_id();
     cpu->exception_index = -1;
+    cpu->can_do_io = 1;
     current_cpu = cpu;
 
     r = kvm_init_vcpu(cpu);
@@ -976,6 +977,7 @@
     qemu_thread_get_self(cpu->thread);
     cpu->thread_id = qemu_get_thread_id();
     cpu->exception_index = -1;
+    cpu->can_do_io = 1;
 
     sigemptyset(&waitset);
     sigaddset(&waitset, SIG_IPI);
@@ -1019,6 +1021,7 @@
         cpu->thread_id = qemu_get_thread_id();
         cpu->created = true;
         cpu->exception_index = -1;
+        cpu->can_do_io = 1;
     }
     qemu_cond_signal(&qemu_cpu_cond);