qemu-log: Rename the public-facing cpu_set_log function to qemu_set_log

Rename the public-facing function cpu_set_log to qemu_set_log. This
requires us to rename the internal-only qemu_set_log() to
do_qemu_set_log().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/monitor.c b/monitor.c
index 2a55d56..6aac4c2 100644
--- a/monitor.c
+++ b/monitor.c
@@ -981,7 +981,7 @@
             return;
         }
     }
-    cpu_set_log(mask);
+    qemu_set_log(mask);
 }
 
 static void do_singlestep(Monitor *mon, const QDict *qdict)