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/hw/misc/arm_sysctl.c b/hw/misc/arm_sysctl.c
index 34d90d5..8524008 100644
--- a/hw/misc/arm_sysctl.c
+++ b/hw/misc/arm_sysctl.c
@@ -14,6 +14,7 @@
 #include "hw/sysbus.h"
 #include "hw/arm/primecell.h"
 #include "sysemu/sysemu.h"
+#include "qemu/log.h"
 
 #define LOCK_VALUE 0xa05f