hw: explicitly include qemu/log.h

Move the inclusion out of hw/hw.h, most files do not need it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/monitor.c b/monitor.c
index 812383f..a2c1ad2 100644
--- a/monitor.c
+++ b/monitor.c
@@ -71,6 +71,7 @@
 #include "trace/simple.h"
 #endif
 #include "exec/memory.h"
+#include "qemu/log.h"
 #include "qmp-commands.h"
 #include "hmp.h"
 #include "qemu/thread.h"