Move hw/ headers to include/hw/

hw/hw.h, hw/irq.h, hw/qdev.h -> include/hw/
hw/pc.h -> include/hw/i386/
hw/isa.h -> include/hw/isa/

hw/irq.c -> hw/core/irq.c

Change-Id: I0f529fef02b5cd3ee7c418d1a4a644d75d32b1d5
diff --git a/hw/android_mips.c b/hw/android_mips.c
index 16e2a48..160c682 100644
--- a/hw/android_mips.c
+++ b/hw/android_mips.c
@@ -9,7 +9,7 @@
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 */
-#include "hw.h"
+#include "hw/hw.h"
 #include "boards.h"
 #include "devices.h"
 #include "net/net.h"