pinctrl: lynxpoint: Replace kernel.h by what is actually being used

The kernel.h is a mess of unrelated things and we only used it
as a proxy to array_size.h, hence switch from former to the latter.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: andy-shev

drivers/pinctrl/intel/pinctrl-lynxpoint.c

@@ -8,11 +8,11 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/array_size.h>
 #include <linux/bitops.h>
 #include <linux/gpio/driver.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
-#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>