exec: move include files to include/exec/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/pc.h b/hw/pc.h
index 5e4d103..a73e3e7 100644
--- a/hw/pc.h
+++ b/hw/pc.h
@@ -2,12 +2,12 @@
 #define HW_PC_H
 
 #include "qemu-common.h"
-#include "memory.h"
-#include "ioport.h"
+#include "exec/memory.h"
+#include "exec/ioport.h"
 #include "isa.h"
 #include "fdc.h"
 #include "net/net.h"
-#include "memory.h"
+#include "exec/memory.h"
 #include "ioapic.h"
 
 /* PC-style peripherals (also used by other machines).  */