leds: expresswire: Don't use "proxy" headers

Update header inclusions to follow IWYU (Include What You Use)
principle.

Signed-off-by: Andy Shevchenko <[e-mail]>
Reviewed-by: Duje Mihanović <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/leds/leds-expresswire.c

···
  * ktd2692 and ktd2801 are known to use this protocol.
  */
 
+#include <linux/bits.h>
 #include <linux/delay.h>
+#include <linux/export.h>
 #include <linux/gpio/consumer.h>
+#include <linux/types.h>
+
 #include <linux/leds-expresswire.h>
 
 void expresswire_power_off(struct expresswire_common_props *props)

include/linux/leds-expresswire.h

···
 #ifndef _LEDS_EXPRESSWIRE_H
 #define _LEDS_EXPRESSWIRE_H
 
-#include <linux/gpio/consumer.h>
+#include <linux/types.h>
+
+struct gpio_desc;
 
 struct expresswire_timing {
 	unsigned long poweroff_us;