Removed a lot of useless #include's from a lot of files and reworked the SCSI #include's a bit to resolve the problem of scsi.h being a mess.

src/intel_piix.c

@@ -10,7 +10,7 @@
  *		    word 0 - base address
  *		    word 1 - bits 1-15 = byte count, bit 31 = end of transfer
  *
- * Version:	@(#)intel_piix.c	1.0.17	2018/06/02
+ * Version:	@(#)intel_piix.c	1.0.18	2018/10/02
  *
  * Authors:	Sarah Walker, <http://pcem-emulator.co.uk/>
  *		Miran Grca, <mgrca8@gmail.com>
@@ -26,7 +26,7 @@
 #include <wchar.h>
 #define HAVE_STDARG_H
 #include "86box.h"
-#include "scsi/scsi.h"
+#include "scsi/scsi_device.h"
 #include "cdrom/cdrom.h"
 #include "dma.h"
 #include "io.h"