iio: light: opt3001: make headers conform to iwyu

Remove kernel.h proxy header, device.h, irq.h, slab.h as they are
unnecessary and add missing headers (array_size.h, dev_printk.h,
errno.h, jiffies.h, wait.h) to enforce IWYU principle and reduce
transitive dependencies. Also, replace bitops.h with bits.h as only
the BIT() macro is used.

Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Author: cjd8

drivers/iio/light/opt3001.c

@@ -8,18 +8,19 @@
  * Based on previous work from: Felipe Balbi <balbi@ti.com>
  */
 
-#include <linux/bitops.h>
+#include <linux/array_size.h>
+#include <linux/bits.h>
 #include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/dev_printk.h>
+#include <linux/errno.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/jiffies.h>
 #include <linux/mod_devicetable.h>
+#include <linux/module.h>
 #include <linux/mutex.h>
-#include <linux/slab.h>
 #include <linux/types.h>
+#include <linux/wait.h>
 
 #include <linux/iio/events.h>
 #include <linux/iio/iio.h>