Fix scsi drivers needing to include <linux/pci.h>

With the simplification of the DMA direction/SCSI data direction
linux/pci.h is no longer pulled in by scsi.h

drivers/scsi/dc395x.c

@@ -59,6 +59,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
+#include <linux/pci.h>
 
 /*---------------------------------------------------------------------------
                                   Features

drivers/scsi/megaraid.c

@@ -40,6 +40,7 @@
 #include <linux/module.h>
 #include <linux/list.h>
 #include <linux/interrupt.h>
+#include <linux/pci.h>
 #include <scsi/scsicam.h>
 
 #include "scsi.h"