Staging: Cleanup useless headers

BKL isn't anymore present into these files thus it is no necessary still include smp_lock.h.
Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/comedi_compat32.c

@@ -26,7 +26,6 @@
 
 #define __NO_VERSION__
 #include "comedi.h"
-#include <linux/smp_lock.h>
 #include <linux/uaccess.h>
 
 #include "comedi_compat32.h"

drivers/staging/comedi/drivers/usbdux.c

@@ -95,7 +95,6 @@ sampling rate. If you sample two channels you get 4kHz and so on.
 #include <linux/slab.h>
 #include <linux/input.h>
 #include <linux/usb.h>
-#include <linux/smp_lock.h>
 #include <linux/fcntl.h>
 #include <linux/compiler.h>
 #include <linux/firmware.h>

drivers/staging/comedi/drivers/usbduxfast.c

@@ -44,7 +44,6 @@
 #include <linux/slab.h>
 #include <linux/input.h>
 #include <linux/usb.h>
-#include <linux/smp_lock.h>
 #include <linux/fcntl.h>
 #include <linux/compiler.h>
 #include "comedi_fc.h"

drivers/staging/panel/panel.c

@@ -41,7 +41,6 @@
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/spinlock.h>
-#include <linux/smp_lock.h>
 #include <linux/interrupt.h>
 #include <linux/miscdevice.h>
 #include <linux/slab.h>