leds: max5970: Add missing headers

Don't inherit headers "by chance" from others.
Include the needed ones explicitly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231214184050.1272848-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: andy-shev

drivers/leds/leds-max5970.c

@@ -7,9 +7,13 @@
  * Author: Patrick Rudolph <patrick.rudolph@9elements.com>
  */
 
+#include <linux/bits.h>
+#include <linux/container_of.h>
+#include <linux/device.h>
 #include <linux/leds.h>
 #include <linux/mfd/max5970.h>
 #include <linux/mod_devicetable.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 #include <linux/regmap.h>