gpio: imx-scu: Use ARRAY_SIZE for array length

Use of macro ARRAY_SIZE to calculate array size minimizes
the redundant code and improves code reusability.
This fixes warnings reported by Coccinelle:
drivers/gpio/gpio-imx-scu.c:106:32-33: WARNING: Use ARRAY_SIZE

Signed-off-by: Rajeshwar R Shinde <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Bartosz Golaszewski <[e-mail]>

drivers/gpio/gpio-imx-scu.c

···
  * to control the PIN resources on SCU domain.
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/gpio/driver.h>
 #include <linux/platform_device.h>
···
 	gc = &priv->chip;
 	gc->base = -1;
 	gc->parent = dev;
-	gc->ngpio = sizeof(scu_rsrc_arr)/sizeof(unsigned int);
+	gc->ngpio = ARRAY_SIZE(scu_rsrc_arr);
 	gc->label = dev_name(dev);
 	gc->get = imx_scu_gpio_get;
 	gc->set = imx_scu_gpio_set;