eeepc-wmi uses kfree() but doesn't include slab.h. Include it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yong Wang <yong.y.wang@intel.com>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <acpi/acpi_bus.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <acpi/acpi_bus.h>