Staging: comedi: add #include <linux/io.h> to a bunch of drivers

On some arches the function virt_to_bus() wasn't being pulled in due to
include chains being different.  So, as we are explicitly calling this
function, explicitly include the proper header file so all will build
properly.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/addi-data/addi_common.c

@@ -58,8 +58,8 @@ You should also find the complete GPL in the COPYING file accompanying this sour
 #include <linux/timer.h>
 #include <linux/pci.h>
 #include <linux/gfp.h>
+#include <linux/io.h>
 #include "../../comedidev.h"
-#include <asm/io.h>
 #if defined(CONFIG_APCI_1710) || defined(CONFIG_APCI_3200) || defined(CONFIG_APCI_3300)
 #include <asm/i387.h>
 #endif

drivers/staging/comedi/drivers/adl_pci9118.c

@@ -67,6 +67,7 @@ Configuration options:
 #include <linux/delay.h>
 #include <linux/gfp.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 
 #include "amcc_s5933.h"
 #include "8253.h"

drivers/staging/comedi/drivers/das1800.c

@@ -102,6 +102,7 @@ Unipolar and bipolar ranges cannot be mixed in the channel/gain list.
 
 #include <linux/interrupt.h>
 #include <linux/slab.h>
+#include <linux/io.h>
 #include "../comedidev.h"
 
 #include <linux/ioport.h>

drivers/staging/comedi/drivers/dt282x.c

@@ -61,6 +61,7 @@ Configuration options:
 #include <linux/gfp.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <asm/dma.h>
 #include "comedi_fc.h"
 

drivers/staging/comedi/drivers/ni_at_a2150.c

@@ -69,6 +69,7 @@ TRIG_WAKE_EOS
 #include "../comedidev.h"
 
 #include <linux/ioport.h>
+#include <linux/io.h>
 #include <asm/dma.h>
 
 #include "8253.h"

drivers/staging/comedi/drivers/ni_labpc.c

@@ -78,6 +78,7 @@ NI manuals:
 
 #include <linux/interrupt.h>
 #include <linux/slab.h>
+#include <linux/io.h>
 #include "../comedidev.h"
 
 #include <linux/delay.h>

drivers/staging/comedi/drivers/pcl812.c

@@ -114,6 +114,7 @@
 
 #include <linux/delay.h>
 #include <linux/ioport.h>
+#include <linux/io.h>
 #include <asm/dma.h>
 
 #include "8253.h"

drivers/staging/comedi/drivers/pcl816.c

@@ -38,6 +38,7 @@ Configuration Options:
 #include <linux/mc146818rtc.h>
 #include <linux/gfp.h>
 #include <linux/delay.h>
+#include <linux/io.h>
 #include <asm/dma.h>
 
 #include "8253.h"

drivers/staging/comedi/drivers/pcl818.c

@@ -104,6 +104,7 @@ A word or two about DMA. Driver support DMA operations at two ways:
 #include <linux/mc146818rtc.h>
 #include <linux/gfp.h>
 #include <linux/delay.h>
+#include <linux/io.h>
 #include <asm/dma.h>
 
 #include "8253.h"