Staging: sep: remove duplicated #include

Remove duplicated #include('s) in
  drivers/staging/sep/sep_driver.c
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/sep/sep_driver.c

@@ -39,7 +39,6 @@
 #include <linux/mm.h>
 #include <linux/poll.h>
 #include <linux/wait.h>
-#include <linux/sched.h>
 #include <linux/pci.h>
 #include <linux/firmware.h>
 #include <linux/slab.h>